用被动语态改写句子。 In the United States, people hold elections for presidents every four years. In the United States, elections for presidents _______________ every four years.
用被动语态改写句子。Originally,somebody wrote the book in Spanish. Originally,the book ____________ in Spanish.
用被动语态改写句子。 Although we were driving fast, a lot of other cars overtook us. Although we were driving fast, we ___________ by a lot of other cars.
用被动语态改写句子。 Did somebody clean the room yesterday? ________ the room _____ by somebody yesterday?