Question

The teacher wanted to know ______.

1. A.
   why was he late for school
2. B.
   how he can answer this question
3. C.
   if he could finish them on time
4. D.
   whether his parents are strict with him

Answer 1

C
解析：
根据时态一致和陈述语序两方面确定。主句谓语动词wanted是一般过去时，宾语从句也应该用过去时的某种形式。A虽是过去时，但不是陈述语序；
B、D是陈述语序，但不是过去时，只有C是正确答案。