问题描述：
1 The photos ___in Beijing Zoo always remind me of happy monment.
A are taken B taking C to take D taken
2 I ___in a middle school for four years.Now I am a successful businessman
A had worked Bworked C have worked D was working
3 -Didnt you pass the exam?
-No,it couldnt be-----
Agood B bad C worse Dbetter
4With his attention ___on his studies,he didnt noticed I had left
Aconcentated B to contrate C concentrating D being concentrate
A are taken B taking C to take D taken
2 I ___in a middle school for four years.Now I am a successful businessman
A had worked Bworked C have worked D was working
3 -Didnt you pass the exam?
-No,it couldnt be-----
Agood B bad C worse Dbetter
4With his attention ___on his studies,he didnt noticed I had left
Aconcentated B to contrate C concentrating D being concentrate
问题解答：
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