–Do you know the boy ___ is standing under the tree?-Yes, he is my friend, Peter.
Zhang Ming has learned English for two years, but he can ______ understand native speakers.
Look at the ______ girl! How ______ she is singing.
—______ your sister ______ in Greener China for a long time? —Yes.She joined it five years ago.
If you keep ______ ,you’ll be a very good swimmer one day.
—______,what time is it now? — It’s eight o’clock.