钱学森爱国故事500字:Though the first letter is ( ) u in the letter useful, we should say ( ) useful book.

Let's see the penguins first in the zoo Though the first letter is ( ) u in the letter useful, we should say ( ) useful book. Let's ( ) our meeting ( ) the first issue, for it needs to be discussed first. in let's the first the see penguins zoo 怎么连成一句话 First,let's sing and dance the first two chindren when the fox first at the first opportunity The First Showcase SCANDAL the first lesson