The DiaoYu Island have been part of China’s territory since ancient times, __________as important fishing grounds of Taiwan.
“Do you think he is lazy?” “I _________ so once, but I don’t now.”
Mike is often absent from class.” “Tell him he _________ answer for it if he goes on behaving like that.”
He tried to ________ in Japanese.
---- Is Mary coming to the concert? ---- I think ________.