题目内容
Lily and Lucy are twins, they _____ good girls, they often help others.
| A．are all | B．all are |
| C．both are | D．are both |
D
解析试题分析：根据题意双胞胎是两个人，所有表示两者都用both，all表示三者或三者以上的都；注意both在句中的位置是be动词之后，实意动词之前；句意：莉莉和路西是双胞胎，他们两个都是女孩，他们经常帮助别人。结合句意，故选D
考点：考查代词的用法。
轻松课堂单元测试AB卷系列答案
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| A．goes, ago | B．went, ago |
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| A．so that | B．as soon as |
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