1 . The i____________ (瞬间) I arrived in Baotou, I fell in love with this city.

2 . Zhong Nanshan, ________ you all know, is a well-known medical expert in China.

A．which

B．who

C．as

D．because

3 . I bought a series of Harry Potter recently, ________ was fairly reasonable.

A．of which the price	B．which price
C．its price	D．the price of whose

4 . It is his fourth visit in a month, ________ says it all.

A．who

B．that

C．which

D．where

5 . We are already experiencing a serious situation ________ people are dying from diseases related to water.

A．where

B．which

C．who

D．what

6 . Those are the most wonderful books ________ they have ever read.

A．which

B．where

C．in which

D．that

7 . That is the reason ________ for his being late in class yesterday.

A．what he explained	B．he explained
C．how he explained	D．why he explained

8 . Nothing is realized easily, and there is no such _______ as dreams.

A．thing

B．a thing

C．things

D．the thing

9 . Mary was a doctor in this hospital from 2016 to 2018, ________ she worked very hard and received the title of Excellent Doctor of the Country.

A．during whose time	B．by that time
C．during which time	D．for which time

10 . At a time ________ beards meant a great deal religiously, he’s telling the men to shave off their beards.

A．when

B．which

C．where

D．that