He---his house yet,he is very sad A doesn’t own B hasn’t own

He---his house yet,he is very sad A doesn't own B hasn't own C hasn't owned D didn't own

选A.doesn't own
own 这个词没有完成时态,因此不选B,C ,又因为后半句用的是一般现在时,提示前文也是现在时.
再问： You'd better ____ ____(不要说话)in class. She could read and write when she was five years old.(简单句) She could read and write_______ _______ ______ _______five. If you don't hurry up, you'll be late again.(同义句) _____ _____,____you'll be late again. She_____ _______ ______(会)swim when she was five.
再答： You'd better not talk in class. She could read and write at the age of five. Hurry up, or you'll be late again. She was able to swim when she was five.
再问： 是see sb do sth吗？ She kept _____on the maths problem.... 是填 working 吗 是make sb do sth吗?? he is a good comrade.he____of others. A thinks always B always thinks C always is thinking D is always thinking
再答： 对， see sb. do sth. make sb. do sth 都是正确的表达。 She kept working on the maths problem He is a good comrade. He always thinks of others. (B)