1 . At the end of this activity, you will still have online access to carefully chosen familiar teachers with         you can discuss your confusing problems.

A．who

B．whose

C．whom

D．which

2 .         works for Douyin is that it is the first kind of platform for short videos not inspired by other western social media.

A．As

B．It

C．What

D．Which

3 . A range of lectures were arranged          the aim of discussing the impact of social media        sports event.

A．with; on

B．by; on

C．with; to

D．by; to

4 . As a high school student, you should ________ your study and never give up working hard.

A．compare to

B．focus on

C．turn to

D．have an impact on

5 . My brother has always been a ________ force in my life, because he always encourages me when I am in trouble.

A．positive

B．negative

C．frightened

D．opposing

6 . Her excellent oral English and optimistic attitude gave me a deep ________.

A．description

B．impression

C．expression

D．collection

7 . Everyone’s fingerprints are ________.

A．universal

B．unique

C．uncertain

D．unbelievable

8 . The football team of No. 1 high school invited us to a match and we decided to accept the ________.

A．chance

B．match

C．challenge

D．opportunity

9 . Tu Youyou and her team used modern research methods to ________the Chinese herbs (药草) one by one.

A．invite

B．include

C．invent

D．investigate

10 . Drop in on us whenever it is __________ for you. We are looking forward to meeting you at home.

A．free

B．spare

C．convenient

D．available