Don’t promise anything ________ you are one hundred percent sure.

Don’t promise anything ________ you are one hundred percent sure.

#37297

after

when

unless

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You should be __________ when you cross the street.

#39147

quiet

easy

careful

hard

Soon she __________ swim a quarter of a mile.

#43028

can

could

is able to

will be able to

We won’t start the meeting ________ the teacher arrives.

#37731

though

until

while

and

There are two _________ reading English at the English Corner(英语角).

#35729

student

mans

students

peoples

--- Is Li Ming in the classroom?--- No, he        there. I saw him in the reading room just now.

#37190

can’t be

mustn’t be

needn’t be

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