His sister went to Beijing last March and last October.She went to Beijing again last month.(改为同义句)His sister has been to Beijing________ ________since last March.
She must be a doctor, ?(完成反意疑问句)
"Are you free to come to my place this Saturday?"Aaron asked me.(改为间接引语)
Aaron asked me free to go to his place that Saturday.
The scientists released the picture of a black hole to the world on April 10.(改为被动语态)
The picture of a black hole to the world by the scientists on April 10.
I have no idea how I can operate the new washing machine.(改为简单句)
I have no idea operate the new washing machine.
The government is taking action to improve air quality.(保持句意不变)
The government is taking action to air quality .