Theywereallsotiredthattheycould

问题详情：

They were all so tired that they could ______.

A. do nothing but sleep                     B. do anything but sleep  

C. do nothing but to sleep                  D. do anything but to sleep

【回答】

A

【解析】考查固定句式do nothing but do，意思是就干...了；什么也做不了，只能做…，故选A。

知识点：复合句

题型：选择题