They had kept working for several weeks everything was in order.
| A．before | B．after | C．since | D．unless |
In the near future, more advances in the robot technology___by scientists .
| A．are making |
| B．are made |
| C．will make |
| D．will be made |
—It is so cold. Why not close the window?
—Sorry. It . I will have it repaired.
| A．won’t be shut |
| B．won’t shut |
| C．hadn’t shut |
| D．isn’t shutting |
The letters for the boss___________ on his desk but he didn’t read them until 3 days later.
| A．were put |
| B．was put |
| C．put |
| D．has put |
They are living with their parents for the moment because their own house __.
| A．is being rebuilt |
| B．has been rebuilt |
| C．is rebuilt |
| D．has rebuilt |
Don't worry. The hard work that you do now ________ later in life.
| A．will be repaid |
| B．was being repaid |
| C．has been repaid |
| D．was repaid |