根据句意及所给的中文,写出恰当单词,使句子的意思完整、正确。He broke his bowl because of his ____________(粗心).
______________ (无论何时) I see you, I can’t help smiling.
You should fly your kite __________ (对抗,与……相反) the wind.
If you want to __________ (成功), you should keep your feet on the ground.
He learned this lesson the hard way — from his own ___________(个人的) experience.