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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____Lily ___Lucy can go with you , because one of them has to stay here to look after their mother

#56055

Either ; or

Neither ; nor

Both ; and

Not only ; but also

It was a great day ,____ we did not enjoy it at the beginning.

#55711

and

but

then

You can’t watch TV         you finish your homework.

#58290

before

while

Hurry up , ________you will be late for the meeting.

#57963

and

but

You can’t pass the exam ______ you study harder.

#57077

unless

when

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