我期待收到你的来信
I'm looking forward to you．
毫无疑问，中国现在更加擅长制造高科技产品。
，China is much better at making high﹣technology products now.
当你说英语的时候不要害怕犯错误。
making mistakes when you speak English.
他过去常常吸烟，但是现在他已经戒掉了。
He smoke，but he has already given it up.
在你离开教室之前，确保窗户都关好。
the windows are closed before you leave the classroom.