下列各句中,没有语病的一句是( )
Who is the tallest boy? —It ______ be John.. John is of medium height.
The explorers were told to ________ themselves with everything they would need for the voyage
There are so many problems. I’m so afraid. — You should try to ______your shyness first. You’renot a child any more.
She ______ live in the country by herself, but now she has become used to _____ together withus in the city.[ ]