30. The pilot, whether ______ or design, made the plane do a sharp turn.
| A．by accident | B．at times | C．suddenly | D．all at once |
Is she wearing the same skirt ___ her sister?
| A．like | B．than | C．as | D．that |
I shall remember the days __ we worked together.
| A．when | B．which | C．that | D．of which |
As a good student, he’s seldom late for school in the morning, ___ he?
| A．was | B．wasn’t | C．is | D．isn't |
Liu Hulan would not ___ even before the enemy and at last died for the people.
| A．give in | B．give back | C．give out | D．give off |
You shouldn't judge a stranger only __ the clothes he wears.
| A．with | B．by | C．to | D．through |