Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.

Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.

#55993

only if

until

so that

even though

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Think it over, _____ you’ll work out the math problem.

#56357

for

and

Li Na is_______ famous_______ all the tennis fans in China know her.

#55953

too; to

enough; to

as; as

so; that

These young orange trees need special care _______ they can live through winter .

#57969

for

because

so that

unless

Tony wanted to take some good photos,______ he lost his camera.

#55983

but

and

Our team tried our best,                 we failed the match at last.

#55595

but

and

while

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