简单的根据汉语意思补全英语句子
1.盼早日回信Please_______ ______me soon.
2.请让我知道你现在过得好不好Please _____me _____if you are happy.
3.这是一本阅读练习的教科书This is a book_____ ______ ______.
4.光比任何东西的传播速度都快.______can______ _____ ______light.