The artistic medium of clay is ________ that images have been found near the remains of fires from the last Ice Age.

So far there is no vaccine ________ in sight for the common cold.

Children just love computer games, ________ many adults.

She wanted to served some coffee to her guests; however, ________.

When friends insist on ________ expensive gifts, it makes most Americans uncomfortable.

Most foreign students don't like American coffee, and ________.

Burrowing animals provide paths for water in soil, and so do the roots of plants ________.

Bees ________ display distinct preferences for different colors, but are also sensitive to ultra-violet light.

In the west the birth of a girl is welcomed with an enthusiam ________ to that of a boy.

Although most adopted persons want to know who their natural parents are, some who have found them wish that they ________ the experience of meeting.