Frank often wears a mask _____ he can keep fit in the foggy and hazy (霾) weather.
#55316
A
only if
B
until
C
so that
D
even though
推荐题目
--This computer doesn't work, Sir.--Well, bring it back, ______ we'll return your money.
#55451
A
and
B
so
C
but
D
because
_______Lisa _______Lucy may go with you because one of them must stay at home to take care of the dog.
#58282
A
Not only ---but also
B
Neither---nor
C
Both---and
D
Either----or
Good to see you again. It’s almost three years _______ we met last time.
#58381
A
until
B
before
C
while
D
since
He knows _________ English ________ French. But he’s very good at Japanese.
#56684
A
either, or
B
both, and
C
neither, nor
D
not, but