选出标点符号正确的那一项。
—I can’t find my notebook, mom. _______ is it? —Peter, it’s under the chair.
—Is this ________ key, Tom? —No, that one is ________.
.—Is this your book, Jane? —_______. Thank you!
—I like this sweater. I’ll take it. —Please pay for (付款) it. It’s 100 yuan.
—Do you like ball games? —Yes. They are very fun.