Peter is my best friend. He often helps ______ with science.
Li was beaten in the contest, ______ had been expected.
Choosing what ______is no longer as easy as it once was, for people’s eating habits are changing,
— Do you have difficulty getting along with the new colleagues? — No. I______ quickly.
The house ______as a reading room is under construction.
He explained the question again to make it easier _______.