1 . Over the years I’ve been trying to figure out________prevents so many Americans from being as happy as one might expect.

A．what it is that	B．that it is what
C．it is what	D．what is it that

2 . It was in that small house ________ was built with stones by his father ________ he spent his childhood.

A．that; where	B．which; that
C．which; which	D．that; which

3 . John's success has nothing to do with good luck. It's years of hard work ________ has made him what he is today.

A．which

B．that

C．what

D．\

4 . —Was it not until the pandemic erupted ________ you were reminded how much a strong body meant?
—Yes, what a pity! I ________ it earlier.

A．and; should realize	B．that; can’t realize
C．and; can’t realize	D．that; should have realized

5 . It was ________ the old clock that the old man spent the whole morning at home.

A．repair

B．repairing

C．to repair

D．in repair

6 . It was on the farm ________ he spent his childhood ________ he learned how to grow vegetables.

A．where; that

B．which; when

C．that; that

D．which; which

7 . Qingming, meaning clear and bright, marks the arrival of spring. It is then ______ seeds are planted and farmers start rearing silkworms.

A．which

B．whose

C．in which

D．that

8 . It was what he meant rather than what he said ______ annoyed me.

A．which

B．as

C．what

D．that

9 . It was not________ the man took off his sunglasses________ I realized he was the football star Messi.

A．after; when

B．until; when

C．until; that

D．after; that