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.