The toughest thing about success is ________ you have to keep on being a success.

The toughest thing about success is ________ you have to keep on being a success.

#33156

why

when

what

that

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________ I had walked for six hours, I was tired out.

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After

Before

When

You have failed two tests.You’d better start working harder,_______ you won’t pass the course.

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and

but

I thought we'd be late for the concert，________ we ended up getting there ahead of time.

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but

for

 Don’t lose heart _________ you fail.

#31772

until　

as if　

unless　　

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People from the West like to use such expressions as “please” and “thank you” in cases ______ some people in Asia may not think it necessary.

#32094

what

which

that

where

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