问题

Keys should never be hidden around thehouse since thieves _____ know where to look

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

正确答案是：

同类题型

The time he has devoted ________ the disabled is now considered ________ of great value [ ]

Is there ______in today’s newspaper

tly, many American women are still faced with the ________ of choosing between work and family commitments.

下列各组文言句式完全相同的一项是（）

I often heard the song _____ in English.