从个位起，第（ ）位是万位，第（ ）位是亿位；亿位的左边一位是（ ）位，右边一位是（ ）位。
五；九；十亿；千万
Michael Jordan has failed over and over again in his life．And that’s _________ he succeeds．
A．what
B．when
C．why
D．where
怎样浅水栽藕？
