根据汉语提示及句子意思，在句中横线上填入适当的单词或词组（每空限填一词）。
We have a history lesson on （星期五）.
Mr. Chen told us a （滑稽可笑的）story yesterday.
—I think quiz shows are wonderful. I can learn a lot from them.—I （同意）with you.
—What about the piece of music?—It （听起来）sweet.
I haven't finished my homework (仍然).
The students talked about a moving movie （ 刚才）.
Everyone knows the Olympic rings （代表）the five parts of the world.
Sometimes the police wear plain clothes to （执行）special tasks.
There is （无疑地）that the Great Wall is one of the greatest wonders in the world.
It's such a big table that it （占据）half of the room.