1. major in

I major in foreign literature.

Jack majors in engineering science.

Susan majors in airport management.

Tom majors in human resources management.

They major in business English.

2. ... so+a./ad.+that...

She was so busy that she forgot to drink water.

She is so young that she can’t look after herself.

He was so angry that he couldn’t say a word.

The movie is so wonderful that I’ve watched it ten times.

Bob works so hard that he does very well in the study.

3. whether... or...

I’m calling him, whether you like it or not.

He hasn’t decided whether to stay at home or go to the beach.

We can choose whether or not to marry.

Tell me whether or not you’re interested.

I wonder whether you like Chinese food or Japanese food.