语法词汇练习 语法大全 语法详解 英语听力 
You cannot take back your words _________ they are out of your mouth.
#30113
A
before
B
whether
C
once
D
while
下一题
推荐题目
It will be at least three years _______ we get to meet again.
#33328
A
before
B
after
C
since
D
when
Everyone knows, perhaps except you, _______ your girl-friend is a cheat.
#34713
A
who
B
which
C
that
D
what
I took my driving license with me on holiday，________I wanted to hire a car.
#30242
A
in case
B
even if
C
ever since
D
if only
The days ____we spent together on the farm are not easy ______．
#34475
A
when,toforget
B
which, to be forgotten
C
that, to forget
D
/,to be forgotten
　　　it is normal for parrots to talk, Einstein, a small bird, is unusual in that whenever she hears a new word or sound, she repeats it over and over until she masters it.
#30576
A
As
B
When
C
While　　
D
Since