We climbed up to the(268) ______ and looked in，expecting to see our writer typing(269) ______ his desk.
A.off
B.on
C.in
D.at
正确答案是D
We climbed up to the(268) ______ and looked in，expecting to see our writer typing(269) ______ his desk.
A.off
B.on
C.in
D.at
正确答案是D