----How terrible the air is!
Yes,if there are ___trees, there will be ___air pollution in our city.
| A．less more | B．more less |
| C．less less | D．more more |
The old man fell ______ and hurt himself.
| A．over | B．in | C．up | D．at |
I’m afraid there _______ a snow tomorrow.
| A．will be going to | B．will | C．will have | D．will be |
—I had a bad cold. I think you’d better ________ to see a doctor.
| A．go | B．to go | C．going | D．went |
—How soon will you finish your homework?—________ an hour.
| A．In | B．On | C．With | D．For |
The reporter said that the UFO ________ from north to south when he saw it.
| A．was traveling | B．traveling | C．travel | D．traveled |