How much are these pants? –_______ twenty dollars．．

Must I hand in my exercise book now, Mr. Zhao?—No, you ______. You may give it to me tomorrow.

There is no ______in pushing children unless they are talented and they enjoy it.

Which is your new neighbour, Liu Hua? —The man _______ T-shirt is red.

Please find more limericks _____ the Internet and learn them _____ heart. [ ]