转换句式4.Mobile phones used to be very expensive.Mobile phones______as expensive as they__ ____to be.

转换句式4.Mobile phones used to be very expensive.Mobile phones______as expensive as they__ ____to be. Mobile phones used tobe very expensive.转换句型2.Mobile phones used tobe very expensive.Mobile phones _as expensive as they_ _ be. where lots of mobile phones are used. ______Mike and Liu Tao have mobile phones? the kind of mobile phones 主语是 The advantage or disadvantage of mobile phones? Should students be allowed to bring mobile phones to school? mobile phones are used--------(wide) around the world should we bring mobile phones to school.(英語作文 Some mobile phones can m___5,000 phone numbers Students mustn't _____ mobile phones at school Is it good for children to have mobile phones? Mobile phones can also_______(use)to tell the time. Mobile phones can also_______(use)to tell the time. Mrs Miller makes a living_(sell)second-hand mobile phones. Is nessary for the students to use mobile phones? the prevalence of mobile phones among college students the cost of mobile phones单数还是复数?