题目内容
The teacher asked the students________________.
A. where did they go
B. that they should do it carefully
C. if their parents allowed them to come here
D. how they can finish it in such a short time
C
【解析】
试题分析：宾语从句的结构：主语+谓语+连接词+从句。从句在句中作宾语。从句要用陈述句的语序。如果主句是一般现在时，从句根据需要选择时态，如果主句是过去时态，从句要用相应的过去时态。但是从句是客观真理，一般用一般现在时态。根据主句是过去时态，故D时态错误，A语序错误，B连接词错误。故选C。
考点：考查宾语从句的用法。
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