2 . 他无法解释他缺席会议的原因, 这让老板非常生气。（account for；定语从句）
_______________________________________________________________________

3 . He earned his passage by working as an unpaid worker, ________ accounted for his appearance. （用适当的词填空）

4 . The Amber Room was a treasure which was decorated with gold and jewels and it took the country’s best artists about ten years to make. (同义句转换)
The Amber Room was a treasure decorated with gold and jewels, ________ took the country’s best artists about ten years to make.

5 . In their spare time, they are interested in planting vegetables in their garden, ________ is on the rooftop of their house. (用适当的词填空)

7 . Like anything, it is possible to have too much of both,________is not good for the health. (用适当的关系词填空)

8 . 阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确式。

Last week,our yearly school sports meeting     1    (hold) and the students of our class took     2    active part in it.On the first day,we watched the impressive opening ceremony    3    (perform) by energetic teachers and students.Soon,the games formally began.Some of my classmates ran to the track to cheer for the     4    （athlete）while others remained    5    (seat),watching them from a distance.I was     6    (excite) because I would compete     7     the 100-meter dash with my classmates cheering.Unfortunately,I fell on the ground,     8     (miss) the chance to win.What a pity!Although I failed,I was still looking forward to a     9     (good) performance the next day.However,as a result of the rain,we had to put off the sports meeting,     10    made us disappointed.

9 . Being younger and thinner, she can eat super big hamburgers, ______ I have to give up in the interest of my weight.

A．that

B．who

C．whom

D．which

10 . The astronaut did many experiments in the spaceship, ______ much help for knowing space.

A．which we think it is	B．which we think are of
C．of which we think are	D．I think which is of