( )（1）____ is this ?
A. Whose B. How C. What
根据汉语意思选择正确的单词。
环境
A. paper
B. environment
C. litter
根据汉语意思选择正确的单词。
能源
A. fire
B. energy
C. water
April 22nd ____________ World Earth Day.
A. are
B. is
C. was
Everybody should do something ____________ our planet.
A. to save
B. save
C. saving
What ____________ we do to protect our environment?
A. do
B. shouldn't
C. can