After three years of hard work, they at last _____ all the money they had borrowed.
| A．paid off | B．paid back | C．paid in | D．paid for |
—Wouldyoucomeandjoinus?
—IwishI_____.Iambusyatthemoment.
| A．can | B．could | C．would | D．should |
You_____getdownthebusuntilthebushasstopped.
| A．can’t | B．needn’t | C．mustn’t | D．don’t |
_____youfetchmesomehotwater?
| A．Can | B．May | C．Must | D．Might |
You_____tothemeetingthismorningifyouhavesomethingimportanttodo
| A．needn’ttocome | B．don’tneedcome |
| C．don’tneedcoming | D．needn’tcome |
Asphysicsishardenough,I_____studyit.
| A．amnotable | B．couldn’t | C．amnotableto | D．cannot |