Mr. Black was so____ to his research that he seldom cared about what happened around him.
| A．devoted | B．concerned | C．absorbed | D．used |
The factory produced many famous cars, none of _____shipped to foreign countries.
| A．which | B．it | C．them | D．that |
I called Hannah many times yesterday evening, but I couldn't get through. Her brother ______ on the phone all the time.
| A．has been talking | B．was talking | C．has talked | D．talked |
The house rent is expensive. I’ve got about half the space I had at home and I’m paying _____here.
| A．as three times much | B．as much three times |
| C．much as three times | D．three times as much |
Medicine shouldn’t be kept where it is _____ to children.
| A．possible | B．obtainable | C．enable | D．accessible |
He studied hard, _____ the exam.
| A．aim at passing | B．aiming passing | C．aiming at passing | D．aim to pass |