17．Scientists oftensuggest that farmers use natural ways to grow fruits．——青夏教育精英家教网——

17．Scientists oftensuggest that farmers use natural ways to grow fruits．（suggestion）

16．Our manager greeted the guestpolitely with a smile at the entrance．（polite）

15．For yoursafety，smoking is not allowed during the whole flight．（safe）

14．Failure isn't always bad．It can teach youuseful lessons．（use）

13．My school is going to have an open day on thetenth of next month．（ten）

12．Last week the students went skating and enjoyedthemselves very much．（them）

11．A seat belt can help protect passengers in many caraccidents．（accident）

10．-________．
-Congratulations!（　　）

	A．	Sorry for breaking the glass．
	B．	How are you feeling today？
	C．	I was awarded first prize in the writing contest．
	D．	Why not take the underground to the university？

9．-Would you like to join me in making cakes tomorrow？
-______．（　　）

	A．	It doesn't matter．		B．	Don't worry．
	C．	You're welcome．		D．	I'd love to．

8．Professor Tu Youyou never stops doing research on Chinese medicine，______？（　　）

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