The achievements of the greatest minds in science could never have been reached________ the patient work of hundreds of others．
#83215
A
were it not for
B
had it not been because
C
had it not been for
D
if it had not been
推荐题目
（湖南省怀化市2014年高三第二次模拟考试）29. — When is he willing to lend his friends some money?— Only when ______ hard enough.
#79561
A
to press
B
pressed
C
pressing
D
is pressed
It was so noisy in the dining room that only by shouting ____ to make himself heard.
#82614
A
he has been able
B
has he been able
C
was he able
D
he was able
(2013·咸阳二模)We should keep in mind that the earth is our only home and only by saving the environment________ourselves.
#79565
A
we can save
B
can we save
C
we must save
D
must we save
At the bell, the door opened and _____, dashing towards the dinning hall, all shouting and laughing.
#80692
A
the hungry students poured out
B
did the hungry students pour out
C
out the hungry students poured
D
out poured the hungry students
I have been living in the town for nearly thirty years, but seldom _____as lonely as I do now.
#82985
A
have I felt
B
I had felt
C
I have felt
D
had I felt.