scovery was made in the 1950s, while the ________ of it was not recognized until half a century later.

Not only____ interested in football but ___ beginning to show an interest in it.

The food here is nice enough—My friend ______ me a right place

When you rewrite the paragraph, I advise you to leave out __________ is thought unnecessary or misleading.

Flying into the airport at Lima, we _________ avoided a head-on crash with another plane.