17．Rio de Janeiro still has a lot of things to prepare for the 2016 Olympics．( )A．doB．didC．to ——青夏教育精英家教网——

17．Rio de Janeiro still has a lot of things _____ to prepare for the 2016 Olympics．（　　）

16．If you find free WiFi in public places，you _____ a password．（　　）

15．People should _____ into the habit of garbage sorting（垃圾分类）in neighborhood．（　　）

14．Mother encouraged the little Tom _____ his special experience in the blog．（　　）

13．People _____ to set off firecrackers in some areas of Shanghai for several months．（　　）

	A．	aren't allowed		B．	weren't allowed
	C．	won't be allowed		D．	haven't been allowed

12．Scientists warn that El Nin?o _____ the world this coming summer．（　　）

11．By the time I got to the check-out，I realized that I _____ my purse at my office．（　　）

10．John was so sleepy that he could hardly keep his eyes _____．（　　）

9．_____ this is your first visit to New York，you'd better learn some of the customs．（　　）

8．Stick to your dreams，_____ they will come true one day．（　　）

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