—_____ the population of the U.S.A. in 2005? —It _____ about 296 million. A.What is; is B.What was; was C.How many is; was D.How many was; is
Smoking can help you relax. But _______ it is also bad for your health.
Some medicine is dangerous for children. Parents should put the medicine in places children can’t _______.
I can do many kinds of housework _______ cooking. I’ll learn it from my mother.
—Where did you go yesterday? —We went to the swimming team. We have fun _______ there.
—He plays basketball so well! Who taught _______? —He learnt it by _______.