单项选择题
空气干燥基成分中，煤是没有水分的。A．对 B．错
单项选择题空气干燥基成分中，煤是没有水分的。
Mrs. Smith persuaded her husband __________the right th...
单项选择题Mrs. Smith persuaded her husband __________the right thing.
Dogs have a very __________sense of smell.A.clearB.nice...
单项选择题Dogs have a very __________sense of smell.
