改写为百分数。

$\frac{1}{4}$= ____                            $\frac{11}{20}$ = ____ 

0.9= ____                           1.85= ____

用括号中所给单词的适当形式完成下列句子。
 Davy enjoys____ (play) tennis and baseball.
It will be____ (wind) in Sanya tomorrow.
Nobody teaches her English. She learns it by____ (she).
Jackie Chan is a famous____ (act).
 I____ (visit) my aunt on the farm last weekend.
In China, September 10^th is____  (teacher) Day.
— Where is Amy?— She____ (go) to Guilin. She’ll be back next week.
We can see many____ (potato) in the supermarket.
 Sometimes it rains____  (heavy) in Wuzhou in summer.
 My grandparents live on the____ (twelve) floor of a tall building.

Can you see the boys          football on the playground? They are my classmates.

如果我们要学习农作物种植、瓜果蔬菜栽培、家禽家畜饲养等知识，可以参考北魏时期的农学著作（     ）