1、Unit 3Section .用所给词的适当的时态、语态形式填空1They _have sold_(sell) ten apartments in the past one hour.2Prices_have fallen_ (fall) sharply over the past six months.3He_has_already_been asked_(ask) to help you.4The company _has made_(make) its workers work hard recently.5A notice_has_ already_been put up_ (put
2、up) on the wall.6Since we realized that we should study hard，our time_has been made_(make) full use of.7These streets_havent been swept_(not sweep) for two days.8How long _has_the book_been kept_ (keep) ?9This old photo_was taken_(take) ten years ago.10These goods _havent been shipped_(not ship) abr
3、oad yet.将下列句子改为被动语态1They have just connected the printer to the computer._The printer has just been connected to the computer (by them)_2We have planted many trees on the hill in the last five years._Many trees have been planted on the hill in the last five years (by us)_3Tom hasnt sold out all the magazines._All the magazines have not been sold out (by Tom)_4Have you found ways to make waste water clean?_Have ways been found to make waste water clean (by you)？_5She has already returned this book to the library._This book has already been returned to the library (by her)_
