A man landed on Mars?You must be&n-考呗网

单选题 A man landed on Mars?You must be joking. That______be true.

A． mustn' t
B． won't
C． can't
D． shan' t

【答案】C。解析：can表推测，可能性，其否定形式为“can’t”意为“不可能”。本句意为有人登上了火星?你肯定在开玩笑，这不可能是真的。故选C。mustn’t意为“将不”；won’t意为“将不”；shan’t意为“不应该”代入句子中均不合适，故应排除。

1 Can you believe that in______a rich country there should bemany poor people?

A． such; such
B． such; so
C． so; so
D． so; such

2 She was so angry that she rushed out into the rain______I could stop her.

A． before
B． off
C． from
D． away

3 -How often do you go to the library?

A． In two days
B． Each third day
C． Every a few days
D． Every few days