1. I’ve learned English for ________.　　　　 A. two years and half　

B. two and half years　 C　 two and a half year　 D. two years and a half

29.　 They left Qingdao last month.　

They have _______ _______ _______ Qingdao since last month.　

Unit 3选 择 填 空 专 项 训 练

28.　 The visitors arrived in Beijing three hours ago.　

The visitors have _______ _______ Beijing for three hours.

27.　 Don’t make your hands dirty.　 _______ your hands _______.

26.　 He joined the party two years ago. He has _____ ____ the party for two years.

25. Uncle Wang died in 1999.　 Uncle Wang _____ ____ ______ since 1999.

24.　 To keep our environment clean and tidy is our duty.

It is our duty ______ _______ our environment clean and tidy.

23.　 He borrowed the book two weeks ago. It _____ two weeks since he ______ the book.

22.　 I will ring you up at once when I arrive in Beijing.

I’ll ring you up ______ _______ _______ I arrive in Beijing.

21.　 Whenever he comes back, I will wait for you.

_______ _______ _______ he comes back, I will wait for you.