It’s been over a year since I ______ back from the countryside.
| A．come | B．came | C．will come | D．had come |
—Peter, let’s check what we still have left.
—Well, _____ is no use evaluating the total loss before the typhoon leaves.
| A．one | B．that | C．it | D．this |
In the factory, the helmets the workers wore varied _____ color according to their different posts.
| A．from | B．in | C．with | D．alongside |
The medicine bought at a high price turned out to have no _____.
| A．influence | B．result | C．effect | D．risk |
Please tell me how global warming _____. I am still in the dark.
| A．came by | B．came out | C．came to | D．came about |
It is high time that we ____ the amount of carbon dioxide in our daily life.
A. reduce B reduced C will reduce D reduces