_ we were walking along the river, we heard a cry for help.

   _    we were walking along the river, we heard a cry for help.

#55724

While

Until

After

Before

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____ Mr. Zhang gave us some good suggestions, but we still didn’t deal with those problems very well.

#55616

Though

But

Because

We don’t look the same,          we’re twins.

#58136

although

because

however

Someone knocked at the door       he was doing his homework.

#55271

after

when

until

as soon as

---You look very healthy. ________do you exercise? -----I exercise three times a week.

#56267

How often

How many

How much

How soon

Be quick,          we'll be late for the meeting.

#56388

and

but

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