For the engine to work, the green button        be in the “on” position.

— I didn’t watch the program “Where are we going, Dad?” yesterday.— I________, either, if my father hadn’t reminded me.

—My uncle suggests I ________ abroad.—I would rather you ________ at home.

He ____ have finished his work; Otherwise, he would．not be enjoying himself by the seaside．

Had Tom studied harder, he ________ the exam.