摘要： -Can you come to Susan’s party? -Sorry, I look after my grandma. A. am B. have to C. can D. do
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—Can you come to Susan's party?
—Sorry. I ________ look after my grandma.
—Sorry. I ________ look after my grandma.
[ ]
A. am
B. have to
C. can
D. do
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B. have to
C. can
D. do