As we know, you won’t go back to the USA since you have established a research center here．But how long _____ in America? —– For almost

Our team ______ every match since April, but we still have three more games to play.

Tom can’t find his gloves. Are these blue gloves his? —No, they ______ be his. His gloves are black.

___is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．

That is the man _____ saved ten children in the earthquake. —How brave he is![ ]