His writing is so confusing that it’s hard to make out _______ it is that he’s trying to express.

For environmental reasons，we aswell take these waste products and have them recycled.

The Foreign Minister’s Five-day visit to this island country, ______to promote the relationship between them, turned out to be a failure because of their differences about nuclear weapons

When he realized the police had seen him,the man ___ the exit sa quickly as possible.

Your desk is crowded with too many unnecessary things,including used papers and books.You’d better __________ some of them.[ ]