My brother's used to hard work.改为否定句
My brother ( ) hard work .
l'm proud to be able to help so many people.改为一般疑问
（ ）be able to help so many people?
Doctors can cure these cases.改为被动语态
these cases（ ）by doctors.
Blindness affects {about 45 million} people around the world.对｛ ｝内提问
( )around the world?
Volunteer doctors perform operations on patients on the plane.改为同义句、
Volunteer doctors （ ）on the plane.
The are such poor patients that they can't afford to travel to hospitals.改为同义句
The patients are ( ） afford to travel to hospitals