当你不小心把别人东西弄坏了，你应该说：
A. Sorry. B. Excuse me.
A butterfly ______ two ______of wings.
A. has; pairs B. has; pair C. have; pairs
Betty is ______ a word puzzle.
A. solving B. solve C. working
What score ______ you get?
A. did B. do C. does
twelve ______ four is eight.
A. Plus B. minus C. and
-_____do you like science best?
-Because it’s interesting.
A. Why B. What C. Who