In recent years,_ __global warming is becoming__ _concern for people all over the world．
| A．the; the | B．不填；不填 | C．不填；a | D．the; 不填 |
.The traffic in our city is already good and it ＿＿＿even better.
| A．gets | B．got | C．has got | D．is getting |
I’ve finally finished my paper and it ＿＿＿＿＿ me an entire month.
| A．takes | B．took | C．was taken | D．had taken |
Good heavens! There you are! We＿＿＿anxious about you, and we ＿＿＿you back throughout the night.
| A．are； expect | B．were； had expected |
| C．have been； were expecting | D．are； were expecting |
They won’t buy new clothes because they＿＿＿money to buy a color TV set.
| A．save | B．are saving |
| C．has saved | D．were saving |
—— Why? Tom, your shirt is so dirty!
—— Mum, I ＿＿＿＿＿ my storeroom downstairs。
| A．cleaned | B．have worked |
| C．was cleaning | D．have been cleaning |