The lady has devoted much of her time ________ South China tigers.A.to protectB.to protecting.C.Protected
I can ______ and my sister Ann can ______ table tennis.
Tom can play ______ football and his brother Mark can play ______ piano.
Listen! Miss Wang ________ Bob.
Mum often ________ us not to play in the street.
Don’t read ________the sun. It’s bad for your eyes.