1 . You won’t find paper cutting difficult ______you keep practising it.

A．as if

B．as long as

C．in case

D．ever since

2 . The boss ______ company my father worked is a kind-hearted person.

A．in which

B．in whose

C．in whom

D．in where

3 . Cheer up! Everybody may have periods in their lives ________ everything seems tough.

A．which

B．when

C．what

D．that

4 . When I was a little boy, the dinner on the eve of Spring Festival was ________________ (我最期待的). (根据汉语提示完成句子)

5 . Professor White has made another discovery, ________ I think, is very important.

A．who

B．which

C．whom

D．that

6 . Building the terraces therefore meant that they could increase the areas ________________ (在上面可以种植水稻). (根据汉语提示完成句子)

9 . Do you remember the day ________ we first met and spent the whole afternoon together?

A．when

B．which

C．that

D．how