虚拟语气
11) It is essential that _______________(每个人都为紧急情况做好准备).
12) _______________(如果他按照我告诉他的办法订票), we would have had quite a comfortable journey.
13) I was to have made a speech _______________(要不是有人把我的话打断了).
14) It didn’t rain last night. _______________(要是下了，地就会湿的).
15) _______________(如果我一直住在纽约), I would know the U.S. well now.
16) If the doctor had not come in time, _______________(他现在就不在人间了).
17) But for his help, _______________(我们就不会以这么低的价格租到房子了).
18) I used my calculator; _______________(否则，我会花更长的时间才能算出这道题).
19) Were I in your place, _______________(我会毫不犹豫地抓住机会).
20) Had it not been for their opposition, _______________(这项法案早就通过了).
21) Should there be another world war, _______________(人类的继续存在就会有危险).
22) He walked lightly _______________(以免惊醒婴儿).