问题
选择题
Mr and Mrs Smith _______ busy _______ their housework.[ ]
A. is; with
B. are; with
C. is; do
D. are; do
答案
答案：B
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Mr and Mrs Smith _______ busy _______ their housework.[ ]
A. is; with
B. are; with
C. is; do
D. are; do
答案：B