Mr Smith， together with his children， ____arrived.
| A．are | B．has | C．is | D．have |
I’m terribly sorry to have kept you waiting so long, but it’ll still be some time _________ Tony gets back.
| A．after | B．since | C．till | D．before |
Our car broke down suddenly and the heavy rain________ our helplessness.
| A．added to | B．led to | C．turned out | D．made up |
Who does that shop assistant think he is? He behaves _______ he owned the store.
| A．even if | B．as if | C．as long as | D．if |
Nelson Mandela _________ his life to fighting for a free society________ all people live together in harmony.
| A．devoted; which | B．spent; in which |
| C．devoted; in which | D．spent; where |
The number of various educational programs is increasing, _______ important roles have been realized by more and more people.
| A．whose | B．where | C．which | D．that |