21. -- How about ______car exhibition? -- I should say it was ______ success.
A. the, a B. the, / C. a, a D. a,/
23. He is a teacher with a lot of ______. He often tells us many of his interesting _____ in Africa.
A. experiences; experience B. experience; experience
C. experience; experiences D. experienced; experience
为什么选A和c,能说明下吗