在英语中，一个从句在句子中用作主语时当成单数看待。
In English, a clause acting as the subject of a sentence counts as singular.
但是，有时候不容易决定主词是单数还是复数。试选择适当的字，填妥以下的句子。
But sometimes it may not be easy to tell whether a subject is singular or plural. See if you can complete the following sentences by choosing the correct word.
在英语中，一个从句在句子中用作主语时作单数看待。
In English, a clause acting as the subject of a sentence counts as singular.
在没有冠词的情况下，如果名词形式（指复数和单数）使用错误，有时可导致句子意思不清楚。
In the absence of an article, it can sometimes be unclear if the wrong sense (plural vs singular) has been used.
在没有冠词的情况下，如果名词形式（指复数和单数）使用错误，有时可导致句子意思不清楚。
In the absence of an article, it can sometimes be unclear if the wrong sense (plural vs singular) has been used.
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