We know that about seventy percent _____ the earth _____ covered by water.
—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.
----What would you like to do this Sunday?-----If it doesn’t rain, I _______to Mount Qingyun for a spring field trip.
My parents are always strict ____ me.
A: Tony won 200 metres race in our school sports meeting.B: .
“It’s a piece of good news.” “Yes. good news it is!”