7.　　　 　I not 　　　(forget) his telephone number,I would have rung him.

6.She insisted that she 　　　　　(send) to work in the faraway small town.

5.Mather often tells us that it is necessary that we 　　　　(drink) a glass of water after we get up.

4.You're five minutes late.I suggested that you 　　　　(come )earlier tomorrow.

3.If they　　　 　(not help) us ,our experiment would have failed.

2.It's time that we 　　　　(go) to the railway station.

1.If you 　　　　(arrive) ten minutes earlier, you could have seen them off.

18.Without electronic computers, much of today's advanced technology 　　　　　achieved.　　　　　　　　　　　　　　　 [　 ] 　A.will not be　　　 B.would not be 　C.would not have been　ot have been　

17.-If he 　　　, he 　　　　that food.　　　 [　 ] 　-Luckily he was sent to the hospital immediately. 　A.was warned; would not take 　B.would be warned; had not taken 　C.had been warned;would not have taken 　D.would have been warned; had not taken

16.The foreign friend speaks Chinese so well as if he 　　　　a Chinese.　　　　　　　　　　　　　　　　　　　　　　　 [　 ] 　A.is　 B.be　 C.should be　 D.was