Question

We _______  pay to get into the concert. It's free.

A．can't

B．mustn't

C．might not

D．don't have to

Answer 1

D

试题分析：句意：我们进入音乐会不必付钱。这是免费的。A. can't 不可能；  B. mustn't 禁止； C. might not 可能不； D. don't have to不必。根据It's free.可知音乐会是免费的，因此不必付钱。故选D。