Snorkeling trips are great fun but they ________ be very dangerous underwater.[

题型：江西省模拟题难度：来源：

Snorkeling trips are great fun but they ________ be very dangerous underwater.[     ]
A. can
B. must
C. shall
D. will

答案

举一反三

You ________ be too careful when crossing the busy street.   [     ]
A. can
B. cannot
C. must
D. mustn’t

题型：安徽省月考题难度：| 查看答案

I am not sure who is going to get the files. We ____ get them but nothing is certain.[ ]
A. must
B. Shall
C. should
D. might

题型：江西省模拟题难度：| 查看答案

Sometimes the boy is a bad-tempered child, but he ______ be quite lovely when he wishes.[     ]
A. may
B. can
C. shall
D. must

题型：江苏同步题难度：| 查看答案

--- ________ the new comer join us in the work?
--- Certainly! We are short of hands presently.[     ]
A. Shall
B. Would
C. May
D. Must

题型：江苏同步题难度：| 查看答案

Things are hard with you, but you _______ try to get over the difficulties, for you have no choice.[ ]
A. can
B. may
C. must
D. ought to

题型：江苏同步题难度：| 查看答案