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1. Favorable policies are ___ to encourage employees39。 professional development.A. in effect B. in mand C. in turn D. in shape2. We were first greeted with the barking by a pack ____ dogs, seven to be exact.3. Modern methods ___ tracking polar bear populations have been employed only since the mid1980s, and are expensive to perform consistently over a large area.4. First celebrated ___ 1970, the Day now includes events in more than 190 countries and regions.5. The answer ___ the question is not clear.6. Soon the box was full ___coins. A lot more people were giving money to the blind boy.7. Children need friends ___ their own age to play with.8. I sat on the side of the stage, ___ my script open on a music stand in front of me.9. Bless your heart, I know you didn’t break the vase ___, don’t cry.A. on purpose B. by accident C. on business D. by mistake10. A great man shows his greatness _____ the way he treats little man.A. under B. with C. on D. by 11. The study suggests that the cultures we grow up _________influence the basic processes by which we see world around us.A. on