I don’t think _________ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
It’s more than half a century ________ my grandfather joined the Party and became a servant to the people.
| A．since | B．that | C．when | D．while |
We ________ the project on time without your timely help .
| A．would not have finished | B．will not finish |
| C．would have finished | D．will finish |
You________ the work better, but you didn’t put more efforts to it.
| A．must have done | B．can have done | C．should have | D．could have done |
The professor you referred to in the letter______ us students three lectures by next Monday.
| A．has given | B．will given | C．will have given | D．Gave |
—What do you think has caused his heart attack?
—It is ______.
| A．because of his overweight | B．due to his being overweight |
| C．his being overweight | D．he is so overweight |