She can't help _____ the house because she's busy making a cake.

She can't help _____ the house because she's busy making a cake.

#94713

to clean

cleaning

cleaned

being cleaned

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We were swimming in the lake _____ suddenly the storm started.

#92676

when

while

until

before

The other day, as I was walking _____ town , I saw a strange sight.

#94744

into

up to

for

with

The Great wall is known      the world.

#92352

for

____some doubt among scientists about the cause of cancer.

#92930

It exists

There exists

There is existing

It is existing

So far as English is concerned,it is not______ you might think.

#95007

so difficult

so difficult as

so much difficult

so difficult that

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