问题

There’s someone knocking on the door．Whoit be?—It must be Mary．She promised to be here at 8：00．

A:must
B:can
C:shall
D:need

正确答案是：

同类题型

I’m sure that he will________every cent he owes you；I have________him.[ ]

I came here to see you

____________ — He’s fine.

He pushed against the rock with all his , hoping to move it to the roadside.

Whydidn’tyou go to play football with us yesterday afternoon? —I_____my mother with the housework then.