Natalie is too young to in the house without a babysitter（）
A. leaving
B. leave
C. be leaving
D. be left
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To his satisfaction, everything well in the experiment（）
A. turned against
B. turned up
C. turned out
D. turned down
Is it the air-conditioner your aunt wants（）
A. to have it repaired
B. to repair it
C. to have repaired
D. to have repaired it
Every possible means , but none proves successful（）
A. has been tried
B. tried
C. is being tried
D. has tried
You can’t imagine what great difficulty I have had your lost novel（）
A. for finding
B. to find
C. in finding
D. found
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