—Can you work out the problem? —I can’t _____

—Can you work out the problem?   —I can’t ______your explain how to do it.

#32743

but for

except

apart from

unless

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6. White-collar workers across China are becoming____ concerned about the impact of the global financial crisis on their careers.

#80134

highly

strictly

hardly

increasingly

It was the most important tomb ____ had ever been founded.

#32159

where

that

which

----How soon will you send the book to me? ----It will be two days _______ you receive my book.

#33944

before

that

since

when

Most volunteers are from universities, _________ it is not uncommon to see middle and primary school students too.

#30378

though

however

since

even if

_____I know she's not perfect, I do like her.

#80425

While

When

Because

Once

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