The native Canadians lived in __________ with nature, for they respected nature as a provider of life.

The FBI last night released pictures of two men __________ planting the bombs which brought great damage to the Boston Marathon.

 I know that it will be difficult to pick him out in such a crowd, but if you ________ happen to see him, give him this packet.

I cannot _______ that all of the students will enjoy your classes. After all, students’ tastes vary.

 Statistics indicate that women are ________ shoppers in Europe, contributing to four­fifths of annual online shopping sales.