________ more effort into my training, that gold medal would have been mine．

A．Had I put

B．Should I put

C．If I put

D．If I should put

"You ________ have been to the gym with Betty," she said angrily, "we have been helping Mr．Brown with some documents, together, and all day!"

A．mustn't

B．can't

C．oughtn't to

D．needn't

Listen! I know he has left and now I want to know when he ________．

A．left

B．has left

C．leaves

D．had left

I don't care how you spend your pocket money, but ________ you have done with it must be worthwhile．

A．that

B．what

C．which

D．no matter what

On our way back home, we found that the water in the small river ________ and the bridge ________ because of the heavy rain．

A．had risen, washed away

B．had risen, had been washed away

C．had been risen, washed away

D．had been risen, had been washed away

Tomorrow is April Fool's Day．Be careful not to be ________．

A．taken in

B．taken off

C．taken on

D．taken out

How long will it be ________ the project is finished?

A．since

B．that

C．before

D．until

Mr．Smith's doctor suggested him ________ cold food these days．

A．not eat

B．not eating

C．not to eat

D．didn't eat

Hearing something, as if a branch ________, he stopped and picked up his ears attentively．

A．break

B．breaking

C．broken

D．broke

In an exam, one is easy to make mistakes ________ he is weak．

A．when

B．in which

C．where

D．if