问题

The police still haven’t found the lost child, but they’re doing all they ________.[ ]

A: can
B: may
C: must
D: should

正确答案是：

同类题型

The furniture, with its modern style and bright colors, suits modern houses and their gardens, but looks _______ in the garden of a traditional home.[ ]

The old couple have three daughters，_____ graduating from the same university

More and more people find ______ necessary to protect our earth.

isthat girl—Oh , she is my friend , Maria.

____is “Lucky 52” shown on CCTV-2 Every week.