1. If the Titanic _________________(not sink) in 1912, there
_____________________(not be) many novels, movies and TV plays about it.
2. Imagine that the iceberg _______________(spot) a bit earlier, it
________________________(not be) too late for the ship to turn and avoid the iceberg.
3. If there ___________(be) enough lifeboats for all passagers, many more lives
________________________(save).
4. If the crew ___________(fill) the lifeboats with enough people, many more lives ______________________( save).
5. If the passagers and the crew ______________(realize) the danger immediately, the accident ____________(not happen).
6. If only the radio operators ____________(listen for) messages 24 hours a day.
7. If the important changes to the marine safety rules ______________(make) before the sinking of the Titanic, many people ____________________(survive).
专练（二）
1. I wish I _______________ (not tell) Annie the bad news last night.
2. It is time that the bus ________ (arrive) to pick up all the passengers.
3. How I wish I ___________ (not eat) so much junk food in my teens.
4. If it ______________ (not have) a flat tyre, I______________ (lend) my car to George that morning.
5. Without the help of tens of thousands of PLA soldiers, many large areas
______________________ (not save) from flooding in 1998.
6. If I ___________ (take) my teacher’s advice a little e arlier, I
________________ (fail) my English test now.。

7. The government issued a new policy to help the jobless , otherwise they
_______________________ ( suffer).
8. —(After a job interview) How is your job?
—I regretted not to study English. If only I _____________ (follow) my teacher’s advice.
9. The government ordered that medical teams ______________ (organize) to help the quake-stricken area.
10. The expert put forward a suggestion that food and tents __________________ (transport) to the quake-stricken area.
专练（三）
1. If she ______________ (not marry) after graduation, she ________ (become) something special in her field.
2. If Zhou Qifeng _____________(give up) the chance to study in his teens, he
________________(not appoint) as the President of Peking University now.
3. It is about time (that) we _____________ (begin) to work.
4. How I wish I ___________ (know) how to operate this computer.
5. If only we _______________(not work) overnight yesterday.
6. If it _______________(rain) tomorrow, the sports meet ________________ (have to) be put off.
7. I ___________ (see) the surface of the moon with my own eyes if I
________________ (go) to the moon some day.
8. If it had not been for your help, we would not have achieved so much in our work. (变为倒装句）
9. He suggested that another meeting _________ (hold) to discuss the housing problem.
10. The workers demanded that the boss raises their wages. (改错）。