Many British people have noticed that butterflies _______ from its natural habitats during the past several years.

He _______ a sense of humor. This is why I don’t like being friends with him.

If it ______tomorrow, we’d stay at home.

—The window is dirty.—I know. It ______ for weeks.

When I was at school, I _____ up very late, reading storybooks.

    -- How can I apply for an online course? -- Just fill out this form and we _______ what we can do four you. 

Professor James will give us a lecture on the Western culture, but when and where _______ yet.

—You didn’t go to the party last night, did you? —I do wish I _________ there, but I had to do my homework.

All the essays _____________, the teacher sent the students home.

A warm welcome ______ to the American guests at the airport tomorrow morning.

The teacher told the students that there _______a meeting at three o’clock.

After the examination，my teacher told me that failure _______the mother of success.

He told us he _______a concert________.

I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time.

The teacher said that Columbus _______America in 1492.

Mr. Li is absent today. What do you consider ________ to him?

—Where are the guests to be from tomorrow?—Many an American boy and many a British girl as well as the teachers to he present.

    He made it clear that only the point that new technologies hold the key to increasing productivity     the economy in the long run.

Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.

——Can you give me some advice on what I said just now?—— Sorry, my mind ______ .