1 . — I’m sorry. I shouldn’t have been shouting at you.
— You ________ your temper but that’s all right.

A．have lost

B．had lost

C．were losing

D．did lose

2 . It is through years of research ________ scientists have discovered the relationship between social media addiction and depression.

A．since

B．before

C．that

D．when

3 . It is in Canada, where Doctor Bethune was born,         the story of the book takes place.

A．where

B．when

C．that

D．which

4 . It was President Xi Jinping_______visited the navy troops on April 19 and urged that naval force_______.

A．who; strengthen	B．whom; strengthen
C．who; be strengthened	D．who; to strengthen

5 . Believe it or not, it is ________________ that causes your illness.

A．because of your being overweight	B．because you are overweight
C．you are so overweight	D．your being overweight

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

A．what	B．which
C．where	D．that

7 . To   _________ credit the four countries _________ work together in some areas.

A．their; do

B．them; does

C．its; did

D．they; to do

8 . Is it he or you ________ in charge of the job and supposed to complete it punctually?

A．who is	B．that is
C．who are	D．whom are

9 . President Xi underlines that it is only with joint efforts to keep maritime peace ________ build a maritime community with a shared future for mankind.

A．can we

B．we can

C．that we can

D．that can we

10 . It was only after a family related conversation ______________ I found out she was actually my distant cousin.

A．when	B．that
C．which	D．who