爷爷正在看书。爸爸正在写电子邮件。妈妈。
当他妈妈回来时，他假装正在看书。
He pretended to be reading a book when his mother came back.
奶奶在看电视，爷爷在看书，爸爸在写电子邮件，妈妈正在做饭。
Grandma is watching TV. Grandpa is reading a book. Dad is writing ane-mail. Mom is cooking dinner.
奶奶在看电视，爷爷在看书，爸爸在写电子邮件，妈妈正在做饭。
Grandma is watching TV. Grandpa is reading a book. Dad is writing ane-mail. Mom is cooking dinner.
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