_______ the wrong bus will waster time and money.

A. Taking

B. Take

C. By

D. Sitting

As students we have　to _______ to learn more knowledge.

A. do our best

B. do the best

C. do your best

D. do better

Mike can't go to watch the football game because he hasn't finished _______ his homework.

A. did

B. done

C. do

D. doing

?Dear, we have to find a gas station.

?Why? Aren't we going to the hotel?

桞ut we will soon run _______ gas.

A. away

B. out of

C. out

D. off

This is a very valuable treasure. I will have it _______ in my safe.

A. to store

B. storing

C. stored

D. store

?Mum, I think I need a bigger room this year.

?Why, honey?

?Look at my collection of footballs. There is no enough _______ to keep them.

A. rooms

B. places

C. place

D. room

?What are you doing, dear?

?I'm writing a letter to grandma. I want to thank _______ the birthday gift.

A. her for giving me

B. she gave me

C. her to giving me

D. she to give me

He doesn't like swimming. He'd like ______ in winter.

A. skating

B. skate

C. skates

D. to skate

?Why do you look so tried?

?Oh, I have worked ______. I need a rest.

A. nine hours ago

B. since nine hours ago

C. since nine hours

D. since ago

?You swim really very well.

?Thank you. I have worked hard at it. I ______ for 10 years.

A. have swimming

B. have been swim

C. been swimming

D. have been swimming