Many boys and girls in this school like doing morning exercises.

In my opinion, 4 1.d means "in my opinion, I think, in my eyes"

Kate is a clever girl in my eyes.

42. A passing "passing, passing ..."

Mr. Smith said that we passed him this morning, but we didn't see him.

43. It seems that "it seems, it seems, it seems"

She looked at me as if she didn't know me.

I'm afraid not. It means "I'm afraid not". Used as a negative answer when others ask for advice.

45.C receive means to receive letters or articles, and accept means to accept and approve.

46. Will do something. Will/will do sth. Soon, as if about to.

I was about to go out when the doorbell rang.

47. upset, upset, upset

Nobody wants to be disturbed while doing something important.

48. Operation, Operation, Control and Drive

This elevator is electric.

49. Surprise is chosen here to express surprise.

You can imagine their surprise when they found the room empty.

50.D collect "collect, gather", while the gathering of a mainly means the gathering of people.

The teacher asked the boys to collect waste paper after dinner.

I hope I can help you! !