1 . World Environment Day is a UN Environment-led global event, ______ takes place on June 5 every year and is celebrated by thousands of communities worldwide. （用适当的词填空）

2 . This year, the 13th Spring Festival Joint Exhibition of Chinese Books, ______ theme was “Reading China”, was held on January 24th in 85 bookstores worldwide. （用适当的词填空）

3 . In this case, cool evening air is a slightly different temperature than the solar cell in the panel. That becomes energy, ________is transformed into electricity.(用适当的词填空)

4 . Climbing, _________ entered the Olympics three years ago in Tokyo, will also be one of the events in the 2024 Paris Olympics. (用适当的词填空)

5 . The railway tunnel, through ________the train goes, will be completed soon．

A．which

B．that

C．it

D．where

6 . He has four dogs, the biggest   ________is called Wang Wang.

A．of that

B．of them

C．of which

D．one

7 . I took my friend to the Summer Palace, ________we had taken some photos.

A．where

B．which

C．that

D．／

8 . Mr Zhou, ________native language was Chinese, could read and write several foreign languages.

A．whose

B．his

C．which

D．that

9 . Mr. Atkinson完全依靠身体语言来体现他的幽默，这让他成为世界知名的喜剧演员。（rely on; 定语从句）（汉译英）

10 . May 30, 2023 is a memorable day, ________the Shenzhou XVI manned spaceship was launched successfully. （用适当的词填空）