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

試題分析：句意：在英語課程開始前，我們必須先付一個月的錢。情態動詞后加動詞原形。根據句意及結構該句是主動結構，故選A。