1 . Yuan Longping is a Chinese rice scientist _______________is leading a research to develop "sea rice".

A．who

B．whom

C．which

D．whose

2 . Some people are _______________ power, wealth or fame, but all I want is only health and happiness.

A．responsible for

B．known for

C．thirsty for

D．thankful to

3 . —How about some more ice-cream?
—No, thanks. It’s very good, but I have to_______________ my weight, you know.

A．prevent

B．watch

C．refuse

D．keep

4 . —How was your trip in the mountains last weekend?
—Fantastic. We even _______________a tent by the lake and lay in it.

A．put on

B．put off

C．put down

D．put up

5 . —Did you find the small village yesterday?
—Yes, without any difficulty, for it has _______________changed over years.

A．hardly

B．greatly

C．clearly

D．nearly

6 . —What do you think of Academician(院士) Li Lanjuan?
—She looks very serious _______________actually she is very kind and modest.

A．if

B．unless

C．because

D．but

7 . ―A new study shows there are many ________________of fast walking.
―I agree. It's good for the environment and it can also save money.

A．instructions

B．products

C．instruments

D．advantages

8 . —Wow, Parasite (寄生虫) won the Oscar for Best Picture this year.
—I was really _______________when I heard about it, because it is the first time that an Asian film won the award.

A．surprised

B．lucky

C．confident

D．sure

9 . —Tom, as well as his parents, _______ to the USA, right?
—Yes, they won't be back until next week.

A．has been

B．have been

C．have gone

D．has gone

10 . ________ you are middle school students, you should learn how to look after yourselves.

A．Though

B．While

C．Since

D．Unless