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回想一下,再看答案

记忆卡片

先回想学过的内容,再查看解释,然后选择下次复习的时间。

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B1

Choose the verb that fits the subject

先写下记得的内容,再查看解释。不要填写个人信息。

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查看解释

Subject-verb agreement means choosing a verb form that matches its subject. With most verbs in present-tense statements, he, she, it, and a singular noun take an ending such as s: the machine works. Plural nouns use the base form: the machines work.

The repair desk opens at nine.
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