. Look! There is a whole crowd of people over there. Go and see what_____ and if it is a bargain, buy it. A is selling B is being sold C has been selling D has been sold
---Where did you see the sponsor, Madame? ---It was in the supermarket __________I was doing some shopping with my husband.
The time he has devoted in the past years ________ the disabled is now considered _______of great value.
It will be quite a long time _______ she is back again, so don’t be too cross with her.
-What does the sign over there say? -“No person _______ bring drinks into the student computer pool.”
Traffic conditions in Beijing ________ for decades. At first people only complained about jams during rush hours,but today every hour is rush hour.