He seems too tired today and I wonderhe got a good sleep last night.A. whenB. thatC. ifD.

问题补充：

He seems too tired today, and I wonderhe got a good sleep last night.

A. when

B. that

C. if

D. where

答案：

A. when

B. that

(答案→)C. if

D. where

解析：主要测试宾语从句。有语境可知句子I wonder中的动词wonder需要宾语，同时结合所给答案可知选择if最佳。译文：今天他看起来比较疲惫，我想知道他昨晚是否睡了个好觉。例如：I rang them to see if I could cancel the appointment。我给他们打电话看能否取消约会。