They kept trying _________ they must have known it was hopeless.
#79919
A
if
B
because
C
when
D
where
推荐题目
When we are young, questions of _______we want to be when we grow up are common.
#33326
A
which
B
who
C
what
D
how
Usually pilots need about a decade of experience _______ they can be promoted to captain.
#31003
A
after
B
before
C
then
D
when
He spoke through a microphone , ______ he was clearly heard in the great hall.
#32480
A
even if
B
because
C
in order that
D
so that