---There is still some doubt ______ he is innocent. ---That’s why he was accused ______ the crime.
She _______ live in North China. As a result, it is difficult for her to _______ the climate here.
Tom’s English is not good, so he devoted all his free time to __________ it.
Who will be ___________ the company when the manager (经理) is out?
________ is a very popular sport in summer.
John failed in the exam, ________he had prepared a lot for it before.