1.A lot of new roads must ___be built______(build)in the west of China.
2.-Where is Jim,please?
-Oh, he ___is leaving___(leave)for Paris.
3.翻译:他们被困在砖石下,毫无办法,只得等待救援.
They were trapped under the bricks and stones.They could do nothing __but__ wait for help.