Question

【题目】— Look! Why are there so many people?
— There are some policemen. I think there ________ a traffic accident.
A.must have
B.can have
C.is going to be
D.must be

Answer 1

【答案】D
【解析】句意：——看！为什么有这么多人？——有一些警察，我想一定出了交通事故。根据句子结构可判断，此句是there be句型。排除A,B；C答案是一般将来时态；根据情况判断，事情已经发生，表示一种肯定的推测。答案为D。
考查There be句型。