1 . John and Sandy argued all the time, ______ completely ruined the evening for the rest of us.

A．who

B．which

C．whom

D．that

2 . My mother was too busy to remember my birthday, ________ made me a little upset.

A．which

B．that

C．whom

D．what

3 . My father, ______ was often the case, came with me to grocery shops and taught me how to pick out produce by smell and touch.

A．as

B．that

C．what

D．who

4 . Constant efforts have been poured into the protection of such traditional local languages ________ are only spoken by a tiny portion of people, in the presence of ________ world cultures are sure to be diverse and colourful.

A．that; which

B．as; which

C．that; whose

D．as; whose

5 . Until ________, the money won’t go to another ambitious investment plan, ________ is run by high-achieving stockbrokers.

A．recovering; which	B．recovered, one
C．having been recovered; which	D．having been recovered, that

6 . Our school offers a wide variety of out-of-class activities, ________ which we all benefit a lot.

A．of

B．among

C．through

D．from

7 . Edison________ questions, ________made his teacher very angry.

A．always asked, that	B．was always asking, which
C．has always asked, which	D．had always asked, that

8 . These days, teachers have been sparing no efforts to create         they hope will be the best means to improve the efficiency of online teaching,         some students don’t notice or care about, though.

A．that, which

B．what, which

C．which, what

D．what, that

9 . _____ we know, plants and animals are important to us.

A．When

B．As

C．That

D．Who

10 . Aristotle emphasized the balancing of the theoretical and practical aspects of subjects taught, ________he clearly mentions reading, writing, mathematics, music, physical education, literature, history, and a wide range of sciences, as well as play, which he also considered important.

A．which

B．where

C．among which

D．through which