问题

He felt _______ to remind the public to protect the environment

A:his duty
B:that is his duty
C:it his duty
D:it is his duty

正确答案是：

同类题型

Do you mind if I smoke here —_______You can go to smoke in the next door.

He was a good student and scored _____ average in most subjects.[ ]

If you have a holiday, why not ________ on atrip?

The murderer reached _____ his gun, and then shot at the man.

Ifyou hdevoting