一、选择题(共15分)
（ ）21. His aunt is _________ old worker in ________ factory.
A a; a B a; an C an; an D an; a
（ ）22. Who’s the man _______ the white shirt?
A in B on C at D to
（ ）23. ________ often help _______ with _______ Chinese.
A His; her; hers B She; him; his C She; him; her D Her; his; him
