They kept trying _________ they must have known it was hopeless.
| A．if | B．because | C．when | D．where |
.
A clean environment can help the city bid for the Olympics, which ______ will promote its economic development.
| A．in time | B．in turn | C．in return | D．in fact |
.
―May I take your order now?
―_________
―OK, I’ll come back in a few minutes.
| A．No, we need more time. | B．Could you bring us the bill? |
| C．Yes, here it is. Thank you. | D．Sure, we’d love to. |
.
―Did you hear the news this morning?
―Oh, yes, ________ was announced on the radio has caused great excitement among pupils.
| A．that | B．what | C．something | D．all what |
.
It was with great courage ______ the boy told the truth _______ he had stolen the money.
| A．which; that | B．when; what | C．as; that | D．that; that |
.
________ as one, the people of that country eventually drove the invaders (侵略者)out of their country.
| A．Linked | B．Combined | C．Joined | D．United |