用括号中所给单词的适当形式完成下列句子。

小题1: Davy enjoys _____ (play) tennis and baseball.

小题2:It will be ____ (wind) in Sanya tomorrow.

小题3: Nobody teaches her English. She learns it by ____(she).

小题4:Jackie Chan is a famous_____ (act).

小题5: I ____(visit) my aunt on the farm last weekend.

小题6: In China, September 10^th is_____ (teacher) Day.

小题7:— Where is Amy?

— She_      (go) to Guilin. She’ll be back next week.

小题8: We can see many_____ (potato) in the supermarket.

小题9: Sometimes it rains _____ (heavy) in Wuzhou in summer.

小题10: My grandparents live on the ____ (twelve) floor of a tall building.

科技论文中的关键词一般为（）。

A.10个

B.2个

C.3-8个

D.根据需要而定