问题

Environment(环境) is very__，but you don’t understand the_ of it，you always drop litter everywhere．

A:took
B:will take
C:was taking
D:am taking;

正确答案是：

同类题型

_____ you keep on working hard, I don’t mind whether you get good marks in your class

I don’t have __________rulers.

It was not until I came here ____ Irealized this place was famous for not only its beauty but also its weather.

According to my grandma, it is agood idea to eat chicken soup when you have a cold.— ________, scientists agree with her.

You __________ only half the price.How would the seller sell the jacket to you?