1 . It is natural __________ children are curious about the world around them.

A．that	B．whether
C．what	D．How

2 . ________online courses can produce good results remains to be seen．

A．That	B．Whether
C．Who	D．Where

3 . New evidence might lead to the conclusion ______ the young woman is lying.

A．whether

B．if

C．why

D．that

4 . ________     makes the book so extraordinary is the creative imagination of the writer.

A．That	B．What
C．Who	D．Which

5 . I was so excited last night that it was a long time _____I got to sleep.

A．that

B．since

C．before

D．when

6 . The aged are close companions, and many of ________ have known each other for decades.

A．them

B．that

C．whom

D．what

7 . ________ she couldn’t understand was ________ fewer and fewer students showed interest in her lessons.

A．What；why

B．That；what

C．What；because

D．Why；that

8 . — I don’t know whether I should go abroad or not, Mum.
— I leave ______ to your own judgment whether you should do it.

A．that

B．it

C．this

D．what