You shouldn’t have the machines ______ all the while. You ought to have them ______ now and then.
#97579
A
run; repair
B
running; repairing
C
run; repaired
D
running; repaired
推荐题目
With the meal ________, the mother sat down for a good rest.
#95689
A
cooked
B
cooking
C
to cook
D
to be cooked
 His career has been an active one: _____. 
#98288
A
writing poetry, working on magazines, and the war in Greece
B
poetry, editing magazines, and the Greek War
C
writing poems, editing magazines, and serving in the Greek War
D
poetry work, editing magazines, and fighting in Greece
“Where is David?” “He is upstairs ______ ready to go out.”
#98439
A
to get
B
getting
C
to be getting
D
having got