—WhatshouldIdowhenIfeelweakandtiredallday?—

问题详情：

 —What should I do when I feel weak and tired all day?

— _____ some yang foods like beef may be helpful.

A. Eat              B. Eating               C. Ate

【回答】

选B。动名词作主语, 答语中谓语是may be。

知识点：构词法

题型：选择题