The murderer was brought in, with his hands _____ behind his back．
A．being tied B．having tied C．to be tied D．tied
We saw many students playing on the playground, most of them _____ girls．
A．are B．being C．were D．have been
He must have finished his homework for a long time, _____ he?
A．mustn’t B．didn’t C．needn’t D．hasn’t
We can see the blue sky and the shining sun．There is no possibility _____ it will rain or snow today．
A．which B．where C．that D．whether
Leaders of many countries have been trying to _____ what it is that makes China develop so fast．
A．carry out B．figure out C．break out D．watch out
The computer system _____ suddenly while he was searching for information on the Internet．
A．broke down B．broke out C．broke up D．broke in
