( )当你想问:多少只鸭子?你可以说: A. How many ducks? B. How many cakes?
根据汉语意思选择正确的单词。能源A. fireB. energyC. water
April 22nd ____________ World Earth Day. A. areB. isC. was
Everybody should do something ____________ our planet. A. to saveB. saveC. saving
What ____________ we do to protect our environment?A. doB. shouldn'tC. can
We can save water and ____________. A. energyB. energysC. energies