on a cool morning为什么不是on the cool morning

on a cool morning为什么不是on the cool morning a cool morning前面用in 还是on i was b_ on a cool spring morning On a cool aftenoon. on a sunny morning为什么用on? They go fishing 什么 a cool morning A.for B.on C.in D.at 用in a sunny morning 还是on a sunny morning?为什么?那on Sunday morning呢 the morning a________was cool and felt wind on my face on a Monday morning the man___black trousers__.A.in;look cool B.on;looks cool C.on;look cool D.in;looks cool Early__the morning of May 1, we started off___the mountain vallage. 为何选A：in；for,为什么?谢谢on a rainy morning, on a sunny morning， on Sunday morning,为何 用on？而in the morning of May 1用in。 few pleasures can equal...of a cool drink on a hot day.为什么that可以one不可以? 选择并说明为什么：He _____ his grandparents _____ Sunday morning .A.visits ,on B.visited,/英语中,“在周日早晨”是Sunday morning 还是on Sunday morning 英语21.Few pleasures can equal _______ of a cool drink on a hot day.21.Few pleasures can equal _______ of a cool drink on a hot day.a.some b.any c.that d.those 为什么 On a warm spring morning,they arrived in London.请详细解释为什么用On ——it is to play football on such a cool afternoon!为什么填What fun,不填How fun? living on the top floor in a tall building is very cool 对cool提问 谁能解释为什么用in a sunny morning 用in.on Monday morning 用on.和in、on、和at的用法.