Our research has focused on a drug which is so _____ as to be able to change brain chemistry.
| A．powerful | B．influential | C．monstrous | D．vigorous |
—What do you think of your nephew?
—He__________ be very naughty but at the same time you poor.
| A．will ; will | B．won't; can't |
| C．may ; may | D．can; can't |
The young man spent as much time as he _____ over his lessons.
| A．went | B．can go | C．could going | D．could to go |
--- Who should I send this message to ?
--- The mayor is the one ___ ?
| A．to send it | B．to be sent | C．for sending | D．to send it to |
He transplanted the little tree to the garden _____ it was the best time for it.
| A．where | B．when | C．that | D．until |
Few pleasures can equal ______ of a cool drink on a hot day.
| A．some | B．any | C．that | D．those |