______ has an internal clock that regulates the beating of our hearts, and the ______ of our breathing.
#13261
A
Mankind; step
B
Human; pace
C
Human being; step
D
Man; pace
推荐题目
_______ the manager came to Beijing on business, he would visit his old friends there.
#14365
A
Every time
B
Many times
C
In no time
D
All the time
In my opinion, it's the flying birds rather than the pilot that________for the air crash.
#12574
A
are to blame
B
is to blame
C
is to be blamed
D
are to be blamed
Sorry, Sophia, I have got a phone call now and I will come back _____.
#12508
A
for the moment
B
in a moment
C
for a moment
D
at the moment
The couple ________their old house and sold it for a vast profit.
#12907
A
didfor
B
didin
C
didwith
D
didup
Shortly after the accident, two___________ police were sent to the spot to keep order.
#14533
A
dozens of
B
dozens
C
dozen of
D
dozen