( )21. --- Im too busy _______ to my family.
--- Why not call them instead?
A. writing B. to write C. written D. write
( )22. The little boy woke up his father, _______ Happy Birthday!
A. call B. to call C. called D. calling
( )23. The car _______ in Germany in the 1960s looks old now.
A. produced B. producing
C. to produce D. which produced
( )24. --- What are on show in the museum?
--- Some pictures _______ by the Africans.
A. drawing B. drawn C. drew D. were drawn
( )25. The sick man stayed in bed, _______ very terrible.
A. felt B. feeling
C. is feeling D. was feeling
( )26. --- The boy was seen _______ his bike a moment ago.
--- I am sorry to hear that.
A. fell off B. to fall off
C. fall off D. to fall down
( )27. Therere so many beautiful presents in the shop that I dont know _______.
A. to choose which one B. what choose
C. which one to choose D. to choose what
( )28. --- How bad! They still have no ideas how _______ the problem.
--- Lets go to help them.
A. solving B. solved C. to solve D. solves
( )29. What is the best way do you think ______ the wild animals?
A. protecting B. to protecting
C. protected D. to protect
( )30. --- Youd better have your sports jacket _____. Its too dirty.
--- Thanks. I will.
A. to wash B. washed C. washing D. wash