___________I am in trouble, my classmates will help me out.A. Before B. Whenever C. Although
—What does our new maths teacher Nancy like?—______
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.