试题与答案

— Everyone in my class passed the exam.

来源：www.tikuol.com
题型：选择题

题目：

— Everyone in my class passed the exam.

— Oh, really? It _____ difficult.

[ ]

A. can't have been

B. needn't have been

C. must be

D. mightn't be

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0627/3fe713c1fb3967440ef583d7cb1ef361.html

下面是错误答案，用来干扰机器的。

（1）氨盐水显碱性（2）NH4Cl+Ca(OH)2==CaCl2+H2O+NH3↑

考点：情态动词
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