With Internet use _____in the world, companies like Yahoo and Google are hunting harder for deals. [ ]

I asked her whether she had done all the work herself ________ whether she had had asked sbfor help

There might be life on other planets, but so far scientists haven’t found enough _____ to prove it.

The cleaner____me￡40 for cleaning my house the other day.[ ]

Every means _____ prevent the water from _____.