When he saw all his books lying on the floor, he knew that something terrible________．

A．should have happened

B．could have happened

C．must have happened

D．would have happened

I will be surprised if you can get Calvin, who is a close-fisted man, ________ these donation draw tickets from you．

A．buy

B．buying

C．buys

D．to buy

________ lie detector tests are not allowed as evidence in the courts, it is nevertheless a useful investigative tool．

A．Unless

B．If

C．Because

D．Although

The fashion designer makes frequent trips to Paris, as it is street ahead ________ fashion is concerned．

A．which

B．where

C．why

D．whose

The chairman interviewed everyone involved in the accident to ascertain the truth behind ________ actually happened．

A．what

B．that

C．it

D．which

He is ________ mastering English－to learn it, he gets up early and goes to bed late every day．

A．bent on

B．bound to

C．desperate to

D．abundant in

In Beijing Olympics, Michael Phelps swam into Olympic history, ________ the first athlete ________ the most gold medals ever．

A．became; to win

B．becoming; to win

C．becoming; winning

D．to become; to win

The ministry didn't expect ________ quite such a negative reaction from farmers．

A．there being

B．it

C．to be

D．there to be

Those concerned by the long-term effects of global warming believe that the damage has been done, ________．

A．whether we take remedial steps now

B．if or not we take remedial steps now

C．whether we take remedial steps now or not

D．unless we take remedial steps now

The authenticity of dialogue and setting often makes low-budget films seem ________ than the somewhat artificial version of reality in Hollywood movies．

A．less real

B．more real

C．much real

D．real