After designing more experiments,they were able to clarify the procedure bees communicate information that they use to find and fetch food.
I’ve had enough of my boss. He is rather too hard ___________ me.
The foreign guests spoke highly of the children and their shows ___________ they saw in the kindergarten.
So far nobody has provided ______ hard evidence to support their claim that they have seen _______ UFO.
—sss,you haven't been acting like yourself.Everything is OK? —.
I am _____ about what I say because careless remarks are likely to hurt others' feelings.