20、--How many ________ have you got in your bag?

--Only one．

A．juice             B．orange            C．eggs

19、We need clean air and water，________ we must protect the environment．

A．because               B．but               C．so

18、Lingling and I are interested in dancing，and ________ of us are good at it．

A．all                B．both          C．none

17、--How much did you ________ on this dictionary?

--Twenty yuan．

A．spend           B．take         C．cost

16、--Must I finish my work in an hour?

--No，you ________．

A．mustn't                B．can't             C．needn't

15、--The teacher speaks English ________，doesn't he?

--Yes，I like listening to him．

A．badly            B．well              C．good

14、--Wow! What a nice skirt you are wearing !

-- ________．

A．Thank you            B．I think so                  C．No，it’s bad

13、--I'll have an important exam tomorrow．

-- ________!

A．Well done            B．You're welcome        C．Good luck

12、-- ________ there ________ a football match?

--I don't know．

A．Is；going to have        B．Is；going to be       C．Are；going to be

11、They ________ Beijing ________ the morning of August 8th，2008．

A．got；on               B．reached；on           C．arrived：in