During this special time, the way people ________each other has changed, we don't shake hands or hug any longer.

A.greet B.accept C.recognize D.help

It's a pity that some students waste energy _________ on line.

A.to chat B.chatting C.chat D.to chatting

Remember how you allowed me ________for dance and music lesson.

A.enter B.entering C.to entering D.to enter

One of the multi-function (多功能) gloves was invented by a junior 3 student in Suzhou. _________ amazing creation it is!

A.What B.What a C.What an D.How

________ he had a good start, I made my effort to run after him at last.

A.When B.Because C.If D.Though

It's too early. I don't think the ticket office is open ________ nine.

A.before B.at C.until D.since

—Today, I met a classmate I haven't seen for many years!

— ________.

A.Enjoy yourselves B.What a surprise C.Congratulations D.It doesn't matter

— I'd like to see Professor Li, please. ________?

—You've just missed him.

A.Is he available B.What's wrong with him C.Does he agree D.What's he doing

All people in our town warmly welcomed the medical workers back from Wuhan. (改为一般疑问句)

_______ all people in our town warmly _______ the medical workers back from Wuhan?

We can protect ourselves by washing our hands more often. (对划线部分提问)

_______ _______we protect ourselves?