My son is mad-------science and technology. I guess he'll become an engineer.

(Fill in the blank)

He came by a very old letter written by his grandmother to his grandfather while he was he was looking for an old photo for his research paper.

Since I will be busy with my homework and preparation for the exam tomorrow, I don't think I will be able to go out tonight.

Sorry, she can't come to the phone. She is having a bath.

People who are good making friends usually work in the field of trade, which requires having good at communicative skills.