1 . 他很累，以至于很快就睡着了。
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2 . 昨天晚上，孩子们那么累，早早地去睡觉了。(so ... that ...)
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3 . 这位老人非常激动，以至于讲话不清晰。( so...that...)
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4 . The snow was so heavy ________ they couldn't drive the car.

A．but

B．if

C．because

D．that

5 . —What do you think of yesterday’s English speech?
—Well, he spoke ________ fast ________ I couldn’t follow it.

A．so; that

B．both; and

C．too; to

D．as; as

7 . He is very young. He can’t make his own decision.(合并为一句)
He is ________ young ________ he can’t make his own decision.

8 . 汤是那么好喝，于是他喝了个精光。
The soup was ______ delicious ______ he drank it up.

9 . My sister was very tired, so she went to bed early tonight. (合并句子）
My sister was ______ tired ______ she went to bed early tonight.

10 . The box was ________ heavy that nobody could move it.

A．very

B．so

C．much

D．such