________a teacher has given permission is a student allowed to enter the classroom.
A. If only B. Only if
C. As if D. Even if
Although the wind has ________，the rain remains steady，so you still need a raincoat.
A. turned up B. gone back
C. died down D. blown out
Gandi insisted on winning independence by peaceful struggles，not by ___.
A. power B. strength
C. energy D. force
The explorer got a disease in blood for ________of fresh vegetables and fruit.
A. sake B. lack
C. ignorance D. knock
Shall we________our discussion and have some tea?
A. break off B. break down
C. break into D. break out
The president spoke at the business meeting for nearly an hour without _________ his notes
A. bringing up B. referring to
C. looking for D. trying on
