Question

The teacher asked the students ________.

1. A.
   what they were doing at that moment
2. B.
   what were they doing at that moment
3. C.
   how are they doing at that moment
4. D.
   what they are doing at that moment

Answer 1

A
试题分析：英语宾语从句中一般为陈述语序。根据从句中的时间状语at that moment那时，可知从句描述的是过去某时发生的动作，故用一般过去时态。故选A。
考点：宾语从句及时态
点评：宾语从句中一般为陈述语序，需注意当疑问词做从句主语时，则貌似倒装句，需注意区分。关于引导词的区分需结合引导词的基本含义及其在句子中所承担的句子成分进行具体分析。宾语从句的时态和主句没有必然的联系，需结合语境具体分析。