The little elephant is afraid to go alone. He always walks _______ his mother. [ ]
Yesterday when I _______ to the station, the train ______ already.
What is the shirt made _____? –Silk(丝绸). It’s made _________ Shanghai.
A low-carbon(低碳)lifestyle has an effectour daily life. More and more attention has been paid toenergies these days.
We are sure tothe volleyball match this afternoon.