Question

Peter ______ be really difficult to deal with at times even though he’s a nice person in general.

A．shall

B．should

C．can

D．must

Answer 1

C

考查情态动词。Shall 将，should 应该，can 有时候可能会，must 必须，句意：皮特有时候真的很难相处，尽管他他多数时候是一个和蔼的人。所以选C。