—This is Jenny speaking. May I speak to Dr. Wang?
—________. I’ll tell him to call you back.
Have a good trip
This is Dr. Wang speaking
I’m glad to hear that
Sorry, he is not available now
—We’ll make a trip to Hainan Island next weekend. Will you go with us? —No, I can’t _____ it at present because I have little money.
—How many students are there in the classroom? —_____. I don’t know where they have gone.
The rubbish _____ is produced every day is becoming a serious problem in cities around the world.
More and more trees were cut down. _____, many animals are dying out.
We should often keep _____ touch with each other, because we are good friends.