问题
选择题
I found John _____ the desk, _____ his homework carefully.
A．seated at; to do
B．sitting at; doing
C．sat at; does
D．taking his seat at; to do
答案
答案：B
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I found John _____ the desk, _____ his homework carefully.
A．seated at; to do
B．sitting at; doing
C．sat at; does
D．taking his seat at; to do
答案：B