1 . A heavy smoker will find smoking hard ________, but once they are in bad condition, most of them will be determined to do it.

A．to be quit

B．to quit

C．to pass down

D．to be passed down

2 . ―“This cloth ________well and ______long.”
—“Ok. I’ll take it.”

A．washes, lasts	B．is washed, lasted
C．washes, is lasted	D．is washing, lasting

3 . My sister bought a kind of cloth. This kind of cloth _______.

A．felt very soft	B．feels very soft
C．is felt very soft	D．feels very softly

4 . It is essential that _____________ to protect our civil rights. 
有必要采取有效的措施来保障我们的公民权利。

5 . These chairs may look good, but they’re very uncomfortable ______.

A．to sit on

B．to be sat on

C．sit on

D．sitting on

6 . Vegetables and fruits online ________ (sell) well last week because of the outbreak of the COVID-19 virus in Changchun. （所给词的适当形式填空）

7 . Philosophers ________back to Plato and the Ancient Greeks have given the area much thought and emphasis, and there is little doubt _________their work has helped shape the practice of education over the millennia.

A．dated, that

B．dating, whether

C．dating, that

D．dated, whether

8 . The book is too difficult for us students ________. (主语+be+adj.+for sb.+to do)
这本书对我们学生来说很难理解。

9 . The cloth ________ fine, but ________ well.

A．looks; doesn’t wash	B．looks; isn’t washed
C．is looked; doesn’t wash	D．is looked; isn’t washed

10 . We worked for ten years without finding anything but it didn’t cast us down. Now our patience has ________.

A．paid back

B．been paid back

C．paid off

D．been paid off