Why is the little boy crying over there —–He is too short to reach ___ the toy bear ___ the toy car on the shelf

(2013·四川，9)Nowadays people are more concerned about the environment________they live.

So suddenly _____ the disease that the whole family were at a great loss.

It’s a ________ clock, made of brass and dating from the nineteenth century.

The government will begin a series of_____ to help thepublic fully understand the new educational system．