— The teacher asked us ________________A. What the bad effect of pollution are.B. What were the bad effect of pollution.C. What the bad effect of pollution were.
_____ will be less pollution if we try our best to protect the environment.
This school is differentothers. It has many out-of-class activities.
Therelots of people at the restaurant when 1 got there.
How long have you _____ like this ? ______ last week.
She learned to playchess all by herself.