1 . ---_________ makes your son feel blue today?
---_________ to watch his favourite cartoon Paw Patrol.

A．What it is that; To be forbidden	B．What is that; Forbidden
C．What is it that; Being forbidden	D．That is what; Having forbidden

2 . —________ you write so well?
—By reading and keeping diaries every day.

A．How is it that	B．Is it how that
C．How it is that	D．What is it that

3 . It ______ we had stayed together for a couple of weeks ______ I found we had a lot in common．

A．was until；when	B．was not until；that
C．was not until；when	D．was until；that

4 . It was not until near the end of the letter ________     she mentioned her own plan.

A．that	B．where
C．why	D．when

5 . Can you explain ________ the sun goes down in the west?

A．why is it that

B．why it is that

C．how it is that

D．how is it that

6 . It is not how much we do but how much love we put into what we do______benefits our work most.

A．who

B．which

C．that

D．what

7 . 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

8 . It was not until he came back _____ he knew the police were looking for him.

A．which

B．since

C．that

D．before

9 . Was it in 1969 ____ the American astronaut succeeded ____ landing on the moon?

A．when; on

B．that; on

C．that; in

D．when; in

10 . It was the training ________ he had as a young man ________ made him so excellent.

A．what; that

B．that; which

C．that; what

D．which; that