1.He-----they didn’t start early they wouldn’t catch the fir

1.He_____they didn't start early they wouldn't catch the first bus.
A.said that if B.asked if C.asked whether D.said that whether
2.Mary's mother asked her__________
A.that whether she had finished her homework
B.if she has finished her homework
C.if she had finished her homework
D.that if she had finished her homework
3.Do you know____?
A.what is he doing B.what he is doing
不光要有答案··最好还要有解释·· 注意喽··后两道是有难度的··

A C B
第一题 根据句子意思 这里要填的是如果的意思,排除C D .
A 他说如果他们不开始早点的话,他们就会错过第一辆公交车
B中if是如果的意思 句子意思为 他问如果他们不开始早点的话,他
们就会错过第一辆公交车 这样似乎意思行不通.如果if是 是否的意
思,那就不合题意啦
第二题 先排除B 因为主从句时态要一致.这里是宾语从句,不能有两个连词（that whether/if）就只剩C啦
第三题 know后面是从句 应该是陈述句语句