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1 think _____ very important for students to study by themselves in the school or at home.

A. it B. this C. that

 Could you please tell me _?

A. why does the earth go around the sun

B. why the earth goes around the sun

C. why the earth went around the sun

The baby is sleeping. Please__ the radio.

A. turn on　　　 B. turn down　 C. turn up

We will climb the mountain tomorrow_ it doesn't rain.

A. if B. although    C. since

Boys and girls, the books in the library should______ good care of.

A. take B. are taking C. be taken

-Where's your father, Tom?

-He__ to Changsha.

A. goes B. went　　　 C. has gone

Li Na is_______ tennis player in China now.

A. most famous　　　 B. the most famous　　 C. more famous

-Is this your hook?

- No. _is newer.

A. Mine B. Yours　　　 C. His

 There are many _______ at the foot of the hill.

A. cow B. horse C. sheep

We should often help _______poor.

A. a B. 不填 C. the