We must do something to protect the earth, ___

We must do something to protect the earth, ____we will lose our home.

#56833

and

but

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He ran quickly all the way to school, ______ he was still late.

#57709

but

and

“Show me your ticket, ________ I won’t let you in.” the guard(保安) said angrily.

#56497

but

and

We lost the soccer game, _ everyone of us played very well.

#58264

because

though

          — I’m looking forward to the latest Hollywood film. _____ will it begin? — ______next Friday.

#57727

How soon; Until

How long; Not until

How soon; Not until

How long; Until

People cut down too many trees, _____ the greenhouse effect becomes more and more serious.

#56516

because

although

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