21. I knew ______ John Lennon, but not ______ famous one.
A. 不填;a   B. a;the    C. 不填;the   D. the;a
22. But these records are not made in any ________sport like swimming or soccer. 
A. conventional  B. special  C. usual  D. ordinary
23. He hasn’t  slept at all for three days._______ he is tired out .
A. There is no point    B. There is no need   C. It is no wonder   D. It is no way