It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.

Tell me how to operate the electronic computer, ______?

As is known to us, happiness consists ____ appreciating ____ you have.

    interested her most was the longitude line,      is an imaginary line dividing the world.
A, That, it         B, What, it                      C, That, which         D, What, which

As we all know, many Chinese words have come into English, ______ typhoon, tofu and kung fu.

 Excuse me, but can you tell me ___________?

_________that we will _______free computer training during the holidays.

“All the students don’t work hard.” means “_________”

---It is no good continuing to work too hard like him.
---No, as the proverb goes, “_____”

Written in a hurry, _____.