The computer was invented in the 1940’s and ______ quite a lot ever since.
| A．was changed | B．had changed |
| C．has been changed | D．will change |
There are many mistakes in your composition and ________, it needs improving.
| A．so | B．then | C．yet | D．therefore |
Sixty people were _______ from the burning ship, but a great many more were drowned when it sank.
| A．protected | B．prevented | C．rescued | D．escaped |
The life he was used to _________ that year, when the terrible earthquake happened in his hometown.
| A．changing | B．change | C．changed | D．be changed |
–What’s the noise?
–It’s the drill. Since the beginning of the term, the workers _______ our heating system.
| A．are repairing | B．have been repairing | C．will be repairing | D．repair |
According to the instructions, the medicine can bring much _________ from the pain.
| A．effect | B．comfort | C．relief | D．relaxation |