—It’s difficult to get to the other side of the river．
—I think a bridge ________ over the river．
A．should be built B．should build
C．will build D．has built
She said she returned the book to the library．I'm sure she ________．
A．did B．does
C．is D．was
一Do you know why he didn’t ________ a word when he ________ to?
—Because he was too nervous．
A．speak；speaks B．say；Was spoken
C．say；spoke D．speak；is spoken
—Do you know the price of the ticket?
—Yes．Each ________ ￥180．
A．pays B．costs
C．takes D．spends
You mustn’t go off on your own，because you ________ get lost in the mountains．
A．should B．must
C．need D．might
一Diaoyu Island belongs to China．
一Surely it does! We Chinese never ________ it up．
A．cut B．fix
C．give D．put
