题干
It's impolite to cut in line when you _______ a bus at the bus stop.
A：ask for
B：look for
C：care for
D：wait for
答案(点此获取答案解析）
D
It's impolite to cut in line when you _______ a bus at the bus stop.
A：ask for
B：look for
C：care for
D：wait for
究，在制定实验方案过程中，下列哪一项可以不考虑 （ ）
