请问这几题怎么填(新概念英语上的) 用正确时态填空 1 I shall have completed this novel by December.By then i ____(work) on it for ten months. 2 Now that you ____ (finish) work you can go home. 用should ought 或have to 填空 1 I couldn't go shopping yesterday afternoon.I___(go) to the dentist. 2 I really ____(buy) a new car but i can't afford to. 3 I didn't know you would be late.You_______(telephone) 哪位知道的朋友能告诉我以上题目的正确解答及这样答的原因 请说明答题得理由 ..... 不知道哪一个才是正确的