It was along the Mississippi River ____Mark Twain spent much of his childhood.
More attention should be paid __________ English.
More than 60 million people in southwestern China ________the drought nowadays as a result of less rainfall, environmental damage and so on
Please don’t do anything harmful ________ our nature, or we humans will have no ________ each other.
What you said just now ________me of that American professor.
—Must I go there right now? — No, you_________.