－How much shall I pay for the phone call?

－You ________．It's free of charge．

A．shouldn't

B．can't

C．don't have to

D．mustn't

We should ________ to protect our environment．Which answer is wrong?

A．do our best

B．try our best

C．do our part

D．try our part

If you want to lose weight, ________ the amount of food you eat．

A．cut down on

B．cut down

C．cut down up

D．cut up

Thousands of people ________ for watching the band perform．

A．had money

B．got money

C．paid good money

D．got good money

She didn't want to go to the party．So she ________ an excuse．

A．made out

B．made up

C．put up

D．put out

It was not until ________ that ________ to prepare his lessons．

A．did his father come in; the boy began

B．his father came in; the boy began

C．did his father come in; did the boy begin

D．his father came in; did the boy begin

There was a lot of fun at yesterday's party．You ________ come, but why didn't you?

A．must have

B．should

C．need have

D．ought to have

It was not ________ she took off her dark glasses ________ I realized she was a famous film star．

A．when; that

B．until; that

C．until; when

D．when; then

It was only when I reread his poems recently ________ I began to appreciate their beauty．

A．until

B．that

C．then

D．so

It was only with the help of the local guide ________．

A．was the mountain climber rescued

B．that the mountain climber was rescued

C．when the mountain climber was rescued

D．then the mountain climber was rescued