高中英语之冠词单项选择
1.Manypeopleagreethat_____knowledgeofEnglishisamustin_____internationaltradetoday.A.a;/B.the;anC.the;theD./;the
2.---Haveyouseen_____pen?Ileftitherethismorning.
---Isit_____blackone?IthinkIsawitsomewhere.A.a;theB.the;theC.the;aD.a;a