下列字母书写格式正确的是 ____。
________ the afternoon he often plays computer games．But ________ yesterday afternoon he did some washing．
My brother spent one hour ________ me with my homework．
—Have a nice weekend！ —________．
—Who cleaned the classroom yesterday？ —Kevin ________，I think．
—________ did she do last night？ —She studied math(数学)．
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