问题
选择题
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
答案
答案：C
题目分析：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。