五月的苹果树，吐放着碧翠的绿意;五月的槐树林，悬挂着银色的花串;五月的北方大地，散发着醉心迷人的春色春气息。
B-Time I-Time O B-Thing I-Thing I-Thing O O O O O O O O O O B-Time I-Time O B-Thing I-Thing I-Thing O O O O O O O B-Thing I-Thing O B-Time I-Time O B-Location I-Location I-Location I-Location O O O O O O O O O O O O O O O