can you see a chimney ( ) the roof of the house now,you are ( ) .what can i do?填(on,over)

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can you see a chimney ( ) the roof of the house now,you are ( ) .what can i do?填(on,over)

can you see a chimney ( ) the roof of the house now,you are ( ) .what can i do?填(on,over)
can you see a chimney ( ) the roof of the house now,you are ( ) .what can i do?填(on,over)

can you see a chimney ( ) the roof of the house now,you are ( ) .what can i do?填(on,over)
on 接触 over 不接触 选on