单选题：He's worked here _______ 4 o'clock this afternoon.

题目内容：

He's worked here _______ 4 o'clock this afternoon. A．for
B．at
C．since
D．about

参考答案：

答案解析：

The students trees if it raining tomorrow.

The students ______ trees if it ______ raining tomorrow.A．will plant, will stop

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--I hear that you're going back to AustraliA．I hope you'll return one day.--__

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Our teacher told him _______ in the street.A．not play B．not to play C．don't pla

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（　　）是民法部门的基本法。 A．合同法 B．民法通则 C．公司法 D．劳动法

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