(2014·北京四中3月模考)It is well known that knowledge is________treasure house，but practice is________key to it.
#99126
A
a；the
B
the；the
C
a；/
D
/；the
推荐题目
Even if your suggestions are ，at least you have tried your best．
#101587
A
taken
B
followed
C
denied
D
banned
My parents have promised to come to see me before I _________ for Africa.
#101964
A
have left
B
leave
C
left
D
will leave
He said that his car __________ stolen and he ________ have to telephone the police.
#101830
A
was; would
B
has been; will
C
had been; would
D
had been; will
Experiments of this kind _______in both the U.S. and Europe well before the Second World War started.
#100664
A
have conducted
B
have been conducted
C
had conducted
D
had been conducted
—Tommy is planning to buy a car.— I know. By next month, he ____ enough for a used one.
#100508
A
saves
B
saved
C
will save
D
will have saved