Rick has learned a lot about Chinese culture ____

Rick has learned a lot about Chinese culture _____ he came to China.

#55330

before

when

until

since

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_____ they are very tired, they feel happy because they’ve finally finished their project.

#58350

Although

But

— Why didn’t you try your best to get on the subway? — I tried to, but it started moving ______ I could get on it.

#56001

before

after

since

You will achieve nothing _       you work hard.

#56195

unless

when

That

Tom doesn’t have any brothers______ sisters.

#57437

and

The boy doesn’t speak       his sister, but his written work is very good.

#58140

as well as

so good as

much better than

much worse than

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