Question

You must ______the English course one month before it begins.

A．pay for

B．paid for

C．be paid for

D．be spent on

Answer 1

A

试题分析：句意：在英语课程开始前，我们必须先付一个月的钱。情态动词后加动词原形。根据句意及结构该句是主动结构，故选A。