He ________ a worker in a factory, but he ________ a pop star two years ago．

A．used to be… has become

B．used to be… became

C．was used to be…becomes

D．was used to being…h(huán)as become

Her brother ________ be tired because he had a long walk．

A．can

B．must

C．may

D．should

________ great fun it is to fly in a balloon!

A．What

B．What a

C．How a

D．How

This kind of snake won't hurt you because it is ________．

A．helpful

B．harmful

C．helpless

D．harmless

The plane has ________ here since an hour ago．

A．reached

B．arrived

C．got to

D．been

My English teacher ________ the Great Wall three times since he came to China．

A．has been

B．has been to

C．has gone to

D．has gone

Since he started high school, he's come to school by bike________．

A．on his own

B．by his own

C．in his own

D．with his own

Sorry, I ________the work yet．

A．have finished

B．didn't finish

C．haven't finished

D．finished

They________ in Beijing when they________ married．

A．live, get

B．lived, have got

C．lived, got

D．have lived, got

________people died in the terrible earthquake．

A．five hundreds

B．hundreds of

C．six hundred of

D．two hundreds of