—Look, the paint is starting to come off ____ the wall is damp.
—Well, we'd better have the wall repainted some day.
| A．when | B．where | C．if | D．once |
Don’t mention that at the beginning of the story, or it may _______ the shocking ending.
| A．give out | B．give away | C．give up | D．give off |
I’m tired out．I stayed up the whole night, ______ for my midterm math exam．
| A．studying | B．to study | C．to be studying | D．studied |
The first prize goes to _______ makes the greatest contribution to the company.
| A．whomever | B．whichever | C．no matter who | D．whoever |
—There aren’t any toys in our suitcase．Where have you put them?
—Oh, no．That old lady sitting next to us ______ have taken ours by mistake.
| A．must | B．could | C．should | D．would |
“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses．
| A．who | B．when | C．which | D．where |