1 . I was told that there were about 50 foreign students studying Chinese in the school, most of ________ were from Germany. （用适当的词填空）

3 . Later, the medicine was tested on malaria patients, most of_recovered. (用适当的词填空)

4 . 目前，新冠病毒（COVID-19）仍然是个大问题，全世界的科学家都在寻找它的解决办法。（非限定性定语从句）(汉译英)

5 . The theory, ____ my opinions are based, consists of three parts.

A．on which

B．in which

C．on that

D．which

6 . John invited about 40 people to his wedding, most of 　　　 are family members.

A．them	B．that
C．which	D．whom

7 . The only one in our office that is familiar with the new system is Jimmy, in _____ absence, we had no choice but to wait．

A．whom	B．whose
C．who	D．that

8 . ______ is surprising to us is that Tom, for _______ English was once boring, can speak English fluently as though he were a native speaker.

A．As; whom	B．What; whose
C．It; whose	D．What; whom

9 . My friend introduced two new films to me,         seemed to be touching judging from the name.

A．none of which	B．either of that
C．neither of which	D．both of them