—I am trying my best to learn English, but it doesn’t work well!—Don’t worry! Regard it ____

—I am trying my best to learn English, but it doesn’t work well!—Don’t worry! Regard it _____ a big challenge!

#58178

with

for

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Please get up at once , ________ you will be late for school .

#56193

though

but

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

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while

though

since

My sister ______ go to bed _______ my mother came back last night.

#55654

not until

doesn't; until

didn't; until

aren't; until

I have ____a raincoat _____ an umbrella. That’s why I have to wait until the rain stops.

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both; and

either; or

neither; nor

not only; but also

     practicing about 10 times, the students gave a concert.

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While

When

Before

After

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