1 . The boy asked his mother ________ go out to play table tennis.

A．that he could	B．if he could
C．if could he	D．whether could he

2 . Mother asked the youngest kid _____________ with his toy car.

A．what the matter is	B．what is the matter
C．what the matter was	D．what was the matter

3 . I really don’t know________I put my wallet after I paid the bill.

A．where was it	B．it was where that
C．where it was that	D．where was it that

4 . I'm interested in learning about how plants __________________（随时间变化）. (根据汉语提示完成句子)

5 . Jessica has always been honest and straightforward, and it doesn’t matter ________ that she’s talking to.

A．who is it	B．who it is
C．it is who	D．it is whom