I can hear you. Can you speak more loudly

If the green light isn’t on, ___________ a minute.

I______of your trying to earn some money, but please don’t ignore your studies.

I called you when I got the news yesterday. But you weren’t in.—Oh, I __________ dinner for the family and didn’t hear it.

下面语句中，与上文衔接最好的一项是（ ）全球经济调整发展，但人类在创造丰富的物质文明的同时，其生存环境也受到极大的破坏，水土流失及荒漠化日益严重。我国西部大开发战略已开始实施，要保证西部大开发的完全成功， 。