one children want to challenge themselves by learning a language different from ______ their parents speak at home.
| A．what | B．that | C．which | D．one |
The World War II made______ impossible for Einstein to go on with his research.
| A．him | B．it | C．this | D．that |
________! Our troubles will soon be over.
| A．Cheer up | B．Take care | C．Watch out | D．Pick up |
-----Excuse me. Is this the right way to the Summer Palace?
-----Sorry, I am not sure. But it _______ be.
| A．must | B．will | C．Now that | D．can |
_______ you’ve got such a good chance, you might as well make full use of it.
| A．Even if | B．Now that | C．As soon as | D．As though |
----- ________ for the fire!
----- It's OK. I’ll be careful enough.
| A．Look up | B．Look around | C．Look through | D．Look out |