Competitors are allowed to take a five-minute break every hour to eat,drink or do ________ is necessary 
#79032
A
which
B
that
C
where
D
what
推荐题目
---Do you know ______ after Japanese earthquake and tsunami(海啸)?     --- Sure. For three weeks.
#38378
A
when did the dog float(漂浮) on the sea
B
when the dog floated on the sea
C
how long did the dog float on the sea
D
how long the dog floated on the sea
He asked ________ for the computer.
#37669
A
did I pay how much
B
I paid how much
C
how much did I pay
D
how much I paid