Why do English people talk so often about the weather when they start a talk? — Because the weather is a(n) ________ topic (话题).
Thanks to the Internet, different kinds of information ________ in a short time.
-- Our school bus will leave at 8 o'clock tomorrow. Don't be late.-- OK. I will be there ten minutes________.
The rivers will become dirtier and dirtier ______ we take action to protect them.
It is helpful to ________ a good habit of reading in language learning.
-- It will be my turn. I feel a little nervous.--________ You can make it!