（ ）21.I think it’s _____ useful book and it is also _____ important learning tool.
A. a ； a B. an ； an C. a ； an D. an ； a
( ) 22. -John isn’t happy today. Let’s go and ____. -Good idea.
A. cheer up him B. cheer him up C. to cheer up D. cheer up
( ) 23. ____ can come in. I’m too busy to see ____.
A. Nobody； somebody B. Anybody； nobody
C. Nobody； anybody D. Somebody； anybody
( )24. On my way ____ home, I lost a ticket ____ Titanic.
A. to； to B. to； of C. /； of D. /； to
( )25. -Mom, my classmates invited me ____ a field trip. May I go with them
A. go on B. to go on C. go in D. to go in
( )26. Please be quick, or we will have no time ____ have lunch.
A. to B. in C. on D. /
( )27. The old man lives ____ but he doesn’t feel ____.
A. lonely； alone B. lonely； lonely
C. alone； lonely D. alone； alone
( )28. She will call you if she ____.
A. goes to B. go back C. come back D. comes back
( )29.--- Hello! Could I speak to Jane
---- Sorry, she isn’t in. She __________ Shanghai.
A.has gone to B. have gone to C. have been to D.has been to
( ) 30.Not only he but also I ______ well in swimming.
A.does B. are C. do D. am
( ) 31.---- Peter has made great progress in math recently.
--- _________ , and so have you.