1.The math problem is so difficult that I can't work it out.(改為簡單句) The math problem is ______
1.The math problem is so difficult that I can't work it out.(改為簡單句)
The math problem is _______ difficult _______ _______ _______ ______ out.
2.The doctor died ten days ago.(改為現(xiàn)在完成時態(tài))
The doctor _______ ________ _______ _______ ten years ago,
3.People use Chinese as the first language in China.(改為同義句)
Chinese _______ _______ ________ the first language in China.