The development of the information _______is making the world become samller .
Vitamin D gets produced when animals are exposed to direct sunlight, for_reason, itis always advisable to give them chances to spend time in the sun.
In the middle of February, the weather__favorable for work, the workers began to repair and secure the dam of the river.
The local guide told the explorers that ropes and knives were__wanted to go into the inner part of the mountain must take along.
In many cities of China, if an ambulance is__in a traffic jam, police will respond to the emergency.
一I think I saw Mr. Smith at yesterday's party.一He__there. He is now on a business trip in Greece. And he left the day beforeyesterday.