A model or an experiment in a science class can help us see things which would remain hidden．
A．therefore B．yet C．otherwise D．still
She must have ranked her birthday presents in order of _because the top one is her favorite．
A.value B．time C．interest D．preference
We have hurried all the way to the airport - the flight was called off because of the foggy weather．
A． mustn’t B． couldn't C． needn’t D． wouldn’t
the room, the nurse found the tape recorder ．
A． Entering; stealing B． Entering; gone
C． To have entered; being stolen D． Having entered; to be stolen
—What happened to the young trees we planted last week?
—The trees _ well, but I_ them．
A． might grow; hadn't watered B． needn't have grown; didn't water
C． would have grown; didn't water D． would grow; hadn't watered
We left the small town, _ clearly _ no need to stay．
A．it; was B．it; being C．there; was D．there; being
