问题
选择题
---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
答案:C
题目分析:爸爸,我们必须等到变成绿灯吗。是的,我们恐怕不得不等到绿灯,这是交通规则。have to 不得不,强调客观原因。故选C。