We ______ to clean the blackboard every day.
A.take turn | B.in turn |
C.by turns | D.take turns |
He even __________ to call the deal off if we didn't satisfy his demands.
A.scolded |
B.threatened |
C.warned |
D.declared |
Mother has told us to __________ some candles in the house in case the electricity is off. So now we are busy __________ the coming night.
A.prepare; preparing |
B.prepare for; preparing |
C.prepare; preparing for |
D.prepare for; preparing for |
Some people maintain that watching violence on TV is one of the major causes of __________ behavior and crime in society.
A.artificial |
B.automatic |
C.aggressive |
D.allergic |
To our surprise, we found the Queen's jewels __________ by special royal soldiers.
A.guarded |
B.trained |
C.impressed |
D.absorbed |
There is a(n)__________ of plants in the old man's yard, such as trees, flowers and grass.
A.group |
B.kind |
C.amount |
D.variety |