完成句子.（共6小题;每小题1分,满分6分）
小题1: The headmaster __________ (宣布) that we would put off the sports meeting because of the weather.
小题2: Old people should be _________ (说) to politely.
小题3: Of all the __________ (发明)，which do you think is the most useful?
小题4:We’ve had several____________(分歧)，but we still get well on with each other.
小题5: I like to sing songs while _________ a shower.( 淋浴)
小题6:.His health is___________(逐渐) improving.