The boys have _______ the stamps for two years. |
A. been collected B. collected C. to collected D. collecting |
Our rain forests are , so we should protect them. |
A. dangerous B. in danger C. invisible D. in safety |
There are five people in the room, but I know . |
A. both of them B. none of them C. all of them D. neither of them |
We are short energy and water the overpopulation. |
A. of; because B. of; because of C. in; because D. in; because of |
—The medicine tastes so bad! —It surely does. But it will ______ you good. |
A. give B. want C. help D. do |