我妹妹的老师鼓励她做一个歌手。
My sister was _______ to be a singer _______ her teacher. 
要想保持身体健康，就要有规律地训练。
_______ you want to be healthy, you should train _______.
我认为请他演广告是不好的。
I _______ think it’s good to ask him to appear in _______.
你能告诉我WTO代表什么吗？
Can you tell me what WTO _______ _______？
确保要记录下周那场艰难的比赛。
Make sure you _______ that _______ match next week.