Not only _____ great thoughts but also they express their thoughts in words which powerfully influence our minds and emotions.

Have you ever wondered why some of thesmartest students in your class sometimes ________ failing exams

Mark needs to learn Chinese________his company is opening a branch in Beijing.

I want to know _____ to do with my bike that you lost the other day.[ ]

The newcomers still don’t know ________ the difficult situation after practicing for 2 months.