Fuel will be more and more expensive.（改为一般疑问句,并作否定回答）
__Will____ fuel __be____ more and more expensive?
_Yes____,it __will____.
My son will be a doctor in the future.(改为否定句）
My son __will___ ___not___ ____be__ a ___doctor___ in the future.
People will work (three days) a week.(对括号部分提问）
____How__ _many______ days a week __will____ people ___work___?
We will go to the park (on foot).（对括号部分提问）
___How__ __will____ _we_____ _____go__ to the park?
The students are seeing a film now.(用 tomorrow 代替 now）
The students __will___ __see___ __a____ ____film__ tomorrow.
楼主,请及时采纳!