【題目】We should brush our ________ every day.

A. toothB. teethC. hand

【答案】B

【解析】

句意:我們應(yīng)該每天刷牙。tooth牙齒,名詞單數(shù);teeth牙齒,是tooth的復(fù)數(shù)形式;hand手。根據(jù)句意…brush…可知,應(yīng)該是“刷牙”,C選項意思不合適。我們的牙齒都是很多的,故應(yīng)用復(fù)數(shù)形式,選B。

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