1 . ______ the students think it their duty to study hard has laid the foundation for the school’s high reputation.

A．That all

B．What

C．All that

D．What all

2 .         I can assure you is that there is no        problem      you report.

A．What; such; as	B．What; such; that
C．Which; such; as	D．Which; such; that

3 . _______ he is concerned about is that his pet cat ____________ for more than three days.

A．That; lost	B．What; has been lost
C．It; has been lost	D．What; lost

4 . In communicating with others, ________ works best of all, I suppose, is a smile.

A．what

B．that

C．which

D．how

5 . It is ________ the fish can survive out of water for months ________ makes them the coolest.

A．where… that

B．when… that

C．that… that

D．what… that

6 . ______ gets home first is to cook supper for our big family.

A．Who

B．Whoever

C．Whom

D．Those who

7 . —What has made her look so sleepy?
—________ she has to get up several times a night to attend to her mother because she is ill.

A．That

B．What

C．Why

D．Where

8 . It is still a mystery ______ caused the infectious virus to spread quickly in this hospital.

A．which

B．where

C．what

D．that

9 . It’s ______ is written on the signs inside the bus ______ has people talking.

A．that; what

B．that; that

C．what; what

D．what; that

10 . From my perspective, ________ matters most on one’s road to success is perseverance.

A．which

B．who

C．why

D．what