After designing more experiments,they were able to clarify the procedure bees communicate information that they use to find and fetch food.
With the help of high technology, more and more substances _________ in the past years.
Jim is the only one of the policemen in his office who __________ the award.
The company the girl used to work ________ was shut down last month.
Unless __________, she won’t go to any party.
__________ his project, the boy had to stay up late.