You ________ wear sports shoes when you climb a mountain．

A．can’t

B．shouldn’t

C．mustn’t

D．have to

Thomas wants to know ________ Nina lives．

A．where

B．who

C．what

D．if

He didn’t go there yesterday, ________ he?

A．did

B．does

C．didn’t

D．doesn’t

He ________ when the UFO arrived．He didn’t wake until the UFO disappeared．

A．slept

B．was sleeping

C．was doing homework

D．was singing

He said that light ________ much faster than sound．

A．has travelled

B．went

C．travels

D．travelled

I won’t pass the exam ________ I work hard．

A．whenever

B．because

C．if

D．unless

I like music that I can dance ________．

A．from

B．by

C．with

D．to

In the past the children were made ________ 15 hours a day．

A．to lock

B．work

C．to work

D．lock

When I got to school, Amy ________ his homework．

A．had invented

B．had finished

C．had developed

D．had rushed

Did you see Peter and Mike? No, I saw ________ of them．

A．neither

B．either

C．both

D．none