问题

The conference aims to develop business and let people think about _______ they can have a positive influence on the planet.

A:why
B:that
C:what
D:how

正确答案是：

同类题型

He says “_______” to his parents before he goes to bed.

Don’t reply to any e-mails _______ personal information, no matter how official or formal they appear.

Thanks for the photo of your family.

Today everyone arrived earlier than _____ [ ]

A tape recorder is made full use of ______ improve our listening ability.