Experts are trying to work out a plan to deal with the problems caused by global warming _________ it is too late.
| A．if | B．before | C．when | D．until |
My parents always let me have my own _____of living .
| A．way | B．method | C．manner | D．fashion |
I don’t think that your speech _____to the crowd, for they appeared quite puzzled.
| A．got back | B．got away | C．got through | D．got across |
Christmas is _____special holiday when _____whole family are supposed to get together.
| A．the; the | B．a; a | C．the; a | D．a; the |
—He must be in the reading-room now. We will find him there.
---No, he _____.Tom said he was ill at home .
| A．must not | B．can’t | C．may not | D．should not |
___ some teenagers don’t realize is ___ difficult life can be after they get addicted to drugs.
| A．What；how | B．What；what | C．That；how | D．That；what |