20．Our school has developed a learning system students can do a lot of teamwork．( )A．thatB．whenC．——青夏教育精英家教网——

20．Our school has developed a learning system students can do a lot of teamwork．（　　）

19．I really don't know _______ I put my wallet．（　　）

	A．	where was it		B．	it was where that
	C．	where it was that		D．	where was it that

18．The part in the film the man broke down the door made some of the audience give a cry．（　　）

17．More than a quarter of the energy in the United States goes to moving people and goods from one place to another．（　　）

16．-The battery in my cell phone is running low．
-I that last night before we went to bed．（　　）

15．What I like about Harvard is there's the old classical look---there are parks and traditional buildings．（　　）

14．With a lot of tough problems ，the pilot was still calm，cool and collective under pressure．（　　）

13． left the door unlocked must be held responsible for the accident．（　　）

12．If we use the new recycling method，a large number of trees ．（　　）

11．-What's wrong with your ipad？The sound is not clear．
-Yes．It has been broken for some time．（　　）

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