The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements.
#32888
A
if
B
till
C
as
D
while
推荐题目
So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.
#34272
A
when
B
that
C
before
D
unless
The days are gone ________ physical strength was all you needed to make a living.(2011·天津，10)
#30486
A
when
B
that
C
where
D
which
______ wants to enter the company must show his ID at the entrance.
#32752
A
Anyone
B
Whoever
C
Who
D
The one
You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.
#31967
A
that; what
B
which; that
C
/; that
D
what; /