旅行吧!

Practice A

3. he felt so sick that he stayed home to rest

    he felt so sick as to stay home to rest

4. our dog was barking so loud that it woke all of us up

    our dog was barking so loud as to wake all of us up

5. he studied so hard that he passed the midterm exam with flying colors(成績優異)

    he studied so hard as to pass the midterm exam with flying colors

Practice B

2. It is raining so hard that we had better stay inside

3. The amount of water in the ocean is so great that it's impossible to imagine it

4. The noise was so loud that it was heard a mile away

5. The mountain is so high that it is unliely to reach the top within one day