—Do you know ______ he is going to stay in Shenzhen? —Sorry, I don’t know. Maybe a few weeks, but I’m not sure.
The factory ______ its waste into the river, but now it deals with the waste in a new way.
一Shall we go out for a trip to relax ourselves after the final exam?
—We need a new leader for our Helping Hands Club,but I don’t know_______.—Why not Mary? She is always willing to help others.
To improve his English,he spends _______one hour a day listening to English programmes.
The art exhibition is really worth _______,and you’re sure to learn lot from it.