题目内容
I have a sore back. You should _____ down and rest.
| A．to lie | B．lying |
| C．lie | D．lied |
C
解析试题分析：句意：我背疼。你应该躺下来休息一下。助动词should是情态动词，故谓语用动词原形lie，故选C。
考点：考查动词的用法。
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