—Oh，Mum，I simply like my new bike.
—Look after it________ it will last long.
A. since B. even though
C. because D. so that
I can't believe it! ________ a little boy knows________ much about space.
A. So；such B. Such；so
C. Such；such D. So；so
Our country has a problem with its air pollution.________must be done!
A. Everything B. Something
C. Anything D. Nothing
Everyone in our family cares about the environment and we________ trees every year.
A. plant B. planted
C. are planting D. have planted
It was careless of Lucy to________ the same mistake once again.
A. recycle B. reduce C. reuse D. repeat
—Jerry，________ are you going to do with the old newspapers?
—I'm going to take them to the recycling centre.
A. how B. what C. which D. where
