The CDs are on sale! Buy one and you get _____ completely free.
—Is this your jacket, Xiao Li?—No, perhaps someone ______ it behind when the meeting was held.
—Why is Jimmy so popular with his classmates?—Because he is humorous and always ______ jokes.
5. His parents put a lot of effort into getting him ______ to a key school.
The seller would sell the shirt for ten yuan, but the customer ______ eight yuan.
With more forests being destroyed, huge quantities of good earth ______ each year.