_________ clever boy your brother is!—So he is. He is_________ in my family.

Since it is expected that FED will cut interest rate again, there is no doubt _____ the company will raise the oil price.[ ]

elighted to _____ your acquaintance,MrBaker

The National Education Department says again school safety has set off alarm bells with frequent serious accidents _____ students got injured or even killed. [ ]

找出字母中大小写不一致的选项