Although she is only 17 years old, she _________ drugs for two years.
| A．Addicts | B．has addicted to |
| C．has addicted | D．has been addicted to |
Leaves are found on all kinds of trees, but they differ greatly __ size and shape.
| A．on | B．from | C．by | D．in |
He began to take political science_____ only when he left school.
| A．strictly | B．truly | C．carefully | D．seriously |
I can't say which wine is best-it's a (n) ___ of personal taste.
| A．affair | B．event | C．matter | D．variety |
---May I ask for a leave,sir?
---sorry,the meeting _____ no absence.
| A．admits | B．admits of | C．admits to | D．admits about |
At the beginning of class, the noise of desks _____ could be heard outside the classroom.
| A．opened and closed | B．to be opened and closed |
| C．being opened and closed | D．to open and close |