一、选择题1．WeChat is _________ useful tool to communicate with others nowadays.A．an B．/ C．the D．a2．I bought useful dictionary yesterday. dictionary is very cheap.A．a; A B．a; The C．an; The3．Zhang Miman, 82, ______ professor at the Chinese Academy of Sciences, was given ______ 2018 L’Oreal-UNESCO for Women in Science award on March 22.A．a; the B．a; an C．the; a D．the; the 4．Ciqikou is _______ famous place in Chongqing.A．a B．an C．the D．/5．—What was the matter with your father?—He had _____toothache so he went to see his dentist yesterday.A．the B．/ C．a D．an6．In China more and more couples want to have ______ second baby so that _____ first child can feel less lonely in the future.A．the ; the B．a ; the C．the ; a D．a; a7．—Who is ____ girl behind the tree ? —Which one ? The one with ______ umbrella ?A．a; the B．an; an C．the; a D．the; an8．You are such __ honest kid, and I would like to invite you for __ dinner..A．an; a B．a; the C．an; / D．a; /9．---What is your cousin like?--Well, my cousin is ______ 11-year-old boy with shirt black hair. He is also very funny and he likes telling _____ jokes.A．a; the B．the; 不填C．不填； the D．an; 不填10．Little Mary is ________ honest girl, so we all like her. Besides, ________ girl looks very pretty. A．a; the B．an; the C．the; a D．the; an 11．Middle school students don' t need to go to _ _ school on weekends. They can go to_ _ park for fun with their parents or friends.A．/，a B．a, a C．the, a D．a, /12．Trees turn green and flowers come out in _______ spring.A．the B．a C．/13．—What do you usually have for______ breakfast?—A piece of bread and _________egg.A．a; an B．/;theC．a; the D．/; an14．—Jim took ___ one-hour ride just now. What a short time he spent finishing such a long way!—He is ______ experienced rider.A．an; the B．a; the C．a; an D．an; a15．___story of Chang’e is regarded as a touching traditional folk story about the Mid-Autumn Festival.A．A B．An C．The D．/16．________baby in red is________eight-month-old boy.A．The;an B．A;a C．The;a D．The;/17．I want to have ________ English pen pal.A．a B．the C．an D．/18．—Thanks for helping me find ____ information I wanted on the Internet.—You are welcome.A．a B．/ C．the19．—What _______ cold weather!—Yes. But it's ______ unusual experience for us who always live in a hot place.A．an；an B．/；a C．/；an D．a；an 20．—Have you seen ______ movie Nice To Meet You?—Yes, it's ______ wonderful one.A．a, the B．the; a C．the; the D．a; a21．On Children's Day, Jack received a prize for being ____ honest boy.A．/ ; an B．the; an C．/ ; a22．—Do you know how to spell ______word “strength” in English?—Yes. It begins with ______“s”.A．The; a B．the; an C．a; the D．the ; the 23．—What’s your dream job, Lucy?—I want to be________doctor.A．an B．a C．the D．/24．Dear children, this is unusual exam. exam is very important to you. Please take it easy. Wish you good results.A．an, The B．a, The C．an, An D．a, An25．The movie is most exciting one and I expect to see it for second time.A．the; a B．the; the C．a; the D．a; a【参考答案】***试卷处理标记，请不要删除一、选择题1．D解析：D【解析】【分析】【详解】句意：现在微信是一个和别人进行交流的有用的工具。
a和an是不定冠词，修饰可数名词单数，表示泛指一个…；an用于元音音素前；the是定冠词，修饰名词表示特指。
根据句意可知，这里指“一个有用的工具”，应用不定冠词，空后的useful的第一个读音是/j/，辅音，故应选D。
2．B解析：B【解析】句意：昨天我买了一本有用的字典，这本字典很便宜。
买了一本有用的字典表示泛指，useful的音标是['jusfl]，是以辅音音素开头的，前面用不定冠词a修饰，后文表示前面提到过的这本字典，是特指，用定冠词the，故选B。
3．A解析：A【解析】句意：张弥曼，82岁，中国科学院的一名教授，于3月22日被授予2018年“联合国教科文组织妇女科学奖”。
根据句意可知第一个空表示泛指一名教授，professor是以辅音音素/p/开头的单词，所以用a修饰；第二个空，表示特指“联合国教科文组织妇女科学奖”，所以用定冠词the，故答案选A。
4．A解析：A【解析】【详解】句意：磁器口是重庆一个很出名的地方。
这里表示的是泛指，famous是以辅音开头的单词，所以应该用不定冠词a，故选A。
5．C解析：C【解析】句意：——你父亲怎么啦？——他牙疼，所以他昨天去看牙医了。
have a toothache牙疼，故选C。
6．B解析：B【解析】句意：在中国越来越多的夫妇想要生二胎，以便于第一个孩子在未来感觉不太孤独。
a+序数词，表示“再，又”；the+序数词，表示“第……”，第一空表示他们想要再生一个孩子，故用a second。
第二空表示第一个，故用the first。
故选B。
7．D解析：D【解析】句意：——树后面的那个女孩是谁？——哪一个？带伞的那个？根据Who is _____ girlbehind the tree可知，在问句中这里特指树后面的女孩是谁，应使用定冠词the。
再根据The one with _____ umbrella可推测，此处泛指一把雨伞，表示“一个”，应用a/an。
又知a/an 的用法：a用于辅音音素开头的词前，an用于元音音素开头的词前，且umbrella/ʌmˈbrelə/是以元音音素开头的，所以此处应用an；故答案选D。
8．C解析：C【解析】【分析】【详解】句意：你真是个诚实的孩子，我想请你吃饭。
such修饰名词，such a/an +adj.+可数名词单数。
honest ['ɒnɪst]以元音音素开头，前面用不定冠词an，三餐的前面不用冠词，故答案为C。
9．D解析：D【解析】句意：——你的表弟长得什么样？——哦，我的表弟是带有短黑发的一个11岁的男孩。
他也是很有趣的，并且他喜欢讲笑话。
11-year-old是复合形容词，11是以元音音素开头的，这里表示泛指用不定冠词an，短语tell jokes表示讲笑话。
根据题意，故选D。
冠词作为一种虚词，在英语中只能和名词一起使用。
英语中的冠词分为不定冠词和定冠词。
点睛：1.不定冠词的用法不定冠词有两个，a 和 an。
a用在辅音开头的单词前面；an用于以元音开头的单词前。
如：a book, an apple。
1）不定冠词用在但数可数名词前表示“某一个”。
如：There is a policeman at the door.门口有个警察。
2) 不定冠词用在单数可数名词之前，表示“任何，每个”。