原形填空(用am,is,are,do,does填空)1.I___a mug.My mug (is) purple.2.You___three flags.Your flags (are0 gray.3.What ___their student doing?就三题,【括号里的,我填对了吗?】

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原形填空(用am,is,are,do,does填空)
1.I___a mug.My mug (is) purple.
2.You___three flags.Your flags (are0 gray.
3.What ___their student doing?
就三题,【括号里的,我填对了吗?】

is,are,is.