改错：Two keys and an alarm clock are on the desk.

改错：Two keys and an alarm clock are on the desk. 改错 Tow keys and a alarm clock are on the desk i found a set of keys and an english book in thelibrary ,who什么them? Look,____ is in the“lost and found” box.看不懂,貌似没有正确答案.要有理由A.some keys B.a set of keys C.two baseballs D.a key and a baseball貌似没有正确答案…… There are two and a half hours left.为什么填two and a A.halfB.two halvesC.half an D.two and a half there were a book and two pens on the desk改错后翻译 There is two pencils and a pen in the box改错 It took him two and a half year to bulid the building 改错 Here are a pen and two books for you改错说明理由, There are a book and two rulers on the desk句子改错 There are a book and two pencils on the desk.改错 改错题：Two set of keys are in the box.改错题：Thank for your bag,Lucy.You must to ask your parents first.Two set of keys are in the box. I have two __ .A.set of keys B.set of key C.sets of keys D.sets of 短文改错A man has an old cat and a young cat.1______He like them very much.A friend came see him 2______and was surprise to find two holes in his door.3______One was big and other was small.“My dear friend,”4_____he said,What are the two hol There are many t____ in my backpackten books,three pens,two erasers and five keys. 这道题怎么改错He is a person to do a job two ,a teacher and a writer. 2个半小时用英语说应该是two and half an hours,还是two and a half hours? The big stone weighs_____.A.two tons and a half. B.two and a half ton. C.half an ton. D.two ton.