You’ll have to pay an extra amount tothe cost of insurance.

Judging from a large amount of evidencepresented, we can safely _________ the Three Gorges Project will changethe lives of a great number of humans forever.

I could _______ by the way she walked that her knee was still bothering her.

If you feel tired out and unable to think clearly,that is________you have to get a rest[ ]

Today’s teens don’t see anything strange in thefact _______the computer takes up a central place in their social lives