Some people say that we live _____ the age of computers.
| A．in | B．at | C．with | D．for |
Low-carbon lifestyle is of great benefit to improve the world environment, but the problem is difficult to _________．
| A．solve | B．be solved | C．solve with | D．solving |
After ten years abroad, he still recognized his old colleagues ________ he set foot in China．
| A．immediately | B．for the first time |
| C．while | D．moment |
We won’t forget the financial crisis and the troubles _______ has caused to the people all over the world．
| A．which | B．this | C．what | D．it |
Thanks for your kind help! We would have _________ lost the game!
| A．otherwise | B．or | C．then | D．therefore |
— What’s that noise? Is the water still running?
— Oh, my god! I ________to turn it off after I brushed my teeth．
| A．was forgetting | B．forgot | C．had forgotten | D．am forgetting |