The old lady had two clever sons, ____ did a good job in the 2010 National College Entrance Exam, though.
| A．none of them | B．both of whom | C．none of whom | D．neither of whom |
The new law has come into _____; surely it will have _____on industry of the country.
| A．affect; an effect | B．effect; affect | C．effect; an effect | D．an effect; an effect |
______the house was started before she went to Africa and now it is still under construction.
| A．Working | B．Working at | C．Working on | D．Work on |
They have made medicine from a new plant _____a cure for fever.
| A．used it as | B．using as | C．and used as | D．used as |
–Does it matter if I give it up this time?
-- It ____if you do. You won’t have ______chance.
| A．does; the other | B．does ; second |
| C．does matter; another | D．does matter; the other |
She won’t come over for a visit unless________.
| A．being invited | B．invited | C．inviting | D．was invited |