From the tears in Nedra's eyes we can deduce that something sad ___

单选题 From the tears in Nedra's eyes we can deduce that something sad __________

A．must have occurred
B．would have occurred
C．might be occurring
D．should occur

参考答案A

解析: A。从内德拉眼中的泪水我们可以推测，一定有令人悲伤的事情发生了。考查情态动词。此句考查情态动词表示推测的用法。must后跟现在完成时表示对过去发生的事情的推测。

单选题 When he tried to make a __________．, he found that the hotel that he wanted was completely filled because of a convention．

A．complaint
B．claim
C．reservation
D．decision

单选题 The court considers a financial __________ to be an appropriate way of punishing him．

A．option
B．duty
C．obligation
D．penalty

单选题 Experts say walking is one of the best ways for a person to __________ healthy．

A．preserve
B．stay
C．maintain
D．reserve