完成句子，根据中文提示，完成句子。（10分）
小题1:I think that Yang Liwei and Liu Xiang are both our country’s _______ (英雄).
小题2:We should exercise to _______ us _______ (增强体质).
小题3:Driving carelessly _______ (引起) accidents.
小题4:The rivers in the countryside are much _______ (清澈) than those in the cities.
小题5:Beijing Opera (充满) famous stories ,beautiful facial paitings, wonderful gestures and fighting.
