如图,矩形ABCD中,由8个面积均为1的小正方形组成的L型模板如图放置,则矩形ABCD的周长为 _
--- Are there ___________ students in your school? --- Yes, _____________ the students is about 2000.
___________ it snows, ____________ the children feel.
Luo Yang devoted all his life _________for China Nation Aviation(中国航天).
______ the age of 89, he passed away ______ a cold winter morning.
I don’t know if my uncle_______. If he______, I will be very happy.