Start studying early and don’t study too much  .
#80937
A
at one time
B
at a time
C
at times
D
from time to time
推荐题目
The headmaster could not go to the meeting; therefore, Mr. Smith _______ him.
#75034
A
ranked
B
represented
C
took the place
D
modelled
I ______ a flu when I was on a spring outing with my classmates.
#69730
A
caught up
B
picked up
C
took up
D
brought up