Light-to-moderate smokers were ________ to die of sudden heart problems than those who had never smoked.
| A．as twice likely | B．twice more possible |
| C．twice more likely | D．as twice possible |
You ________ tell anybody else about it; this is a secret between us.
| A．don’t | B．needn’t | C．mustn’t | D．won’t |
It is the first time that I_____ the night face to face.
A. have seen B.had seen C saw. D.see
French is also ____ useful language with a long history .
| A．an | B．the | C．/ | D．a |
. ___ is a fact that English is being accepted as an international language.
| A．There | B．This | C．That | D．It |
It is necessary that a college student ______at least a foreign language.
| A．masters | B．should master | C．mastered | D．will master |