good manners to say “Sorry” when you knock into someone but no need to say it again and again .
#92894
A
There are ; there is
B
It is ; there is
C
There is ; it is
D
It is ; it is
推荐题目
When he knocked at the door, my mother was busy ____ supper.
#94849
A
preparing for
B
in preparing
C
to prepare for
D
to prepare
Newton was sitting under an apple tree ______ an apple fell onto his head.
#92858
A
when
B
while
C
after
D
before
You are always telling me I am lazy. Look at your room. What a mess it is! ________.
#92949
A
The day has eyes, the night has ears
B
The great thieves punish the little ones
C
That is like the pot calling the kettle black
D
When one will not, two cannot quarrel
—Tell Jack I will wait for him at the school gate.—______ he doesn’t come?
#95002
A
How about
B
What if
C
If only
D
Whatever
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
#92433
A
since
B
after
C
before
D
when