If an airplane is ________, it will certainly be smashed.

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A. set; looked 　　　　　　　　　　　　　　　　   B. set; looking

C. setting; looked 　　　　　　　　　　　　　　  D. setting; looking

A.　　  Having been failed 　　　　　　　　　　   B. Having failed

C. Though failed 　　　　　　　　　　　　　　   D. Because of failure

A. would　　　　　　   B.should　　　　　　　　　　   C.had better　　　　   D.might

A. Being founded　　  B. It was founded　　  C. Founded　　  　　　　　　  D. Founding

A．in that case

B．in what case

C．in which case

D．in either case

A．must have

B．should

C．need have

D．ought to have

—Oh, did you? You ________ with Barbara．

A．could have stayed

B．could stay

C．would stay

D．must have stayed

A．a bit

B．a little

C．any

D．less

A．oughtn’t to

B．can’t

C．won’ t

D．needn’t