I felt____after he opened the present. I thought he would have liked it.

Do you mind opening the windowthe air inside is not so fresh.— __________, Mr. Smith is taking a nap (小睡)，don’t make him catch a cold.

Let’s ______my scientific knowledge and your business skills and start a company.

He is not very confident and always _______ before making a decision.

_____ little children can only do______little work.