— Dad must we wait until the light becomes green? — Yes I’m afraid we . That’s the traff

问题补充：

— Dad, must we wait until the light becomes green?

— Yes, I’m afraid we . That’s the traffic rule.

A. can

B. may

C. have to

D. need

答案：

A. can

B. may

(答案→)C. have to

D. need

解析：句意:-爸爸，我们必须等到交通灯变绿吗？-是的，恐怕我们必须得这样，这是交通规则。can 能，会；may 可以；have to 必须，不得不；need 需要。本题考查的是情态动词，根据句意这里我们必须要遵守交通规则，故选C。