David didn’t give up ______ he had failed in the experiment four times.

David didn’t give up ______ he had failed in the experiment four times.

#58224

while

though

since

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—How long have you known the doctor ? —         he helped me three years ago.

#58435

When　

Before　

Because

Since

___________ the car’s old, it still runs well.

#55333

Because　　　

Although

But

– This dress was last year’s style.– I think it still looks perfect ________ it has gone out of fashion this year.

#56046

so that

as if

ever since

even though

－Have you heard of Liu Qian from Taiwan?－Sure! His magic performance is _______amazing for people ______forget．

#57882

so; that

such; that

too; to

very, to

The story was _______ interesting _______ everyone would listen to it.

#55984

too, to

enough, to

so, that

such, that

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