问题

There’s a ______in our office that when it’ssomebody’s birthday，theybring in a cake for us all to share

A:can’t
B:may
C:must
D:mustn’t

正确答案是：

同类题型

with the information you have gathered, you can ________ preparing your business plan.

Please do me a favor, —the box upstairs.

________you know how to manage your time,you can try to work and look after the children well meanwhile.[ ]

Without the mobile phone and Internet，communicating with each other ________ quite difficult today.[ ]

Why do you feel so unhappy–Bad luck . When I arrived at the airport, my flight __________.