Question

英语问题求助。。。谢谢~

12.i’ll give the message to her as soon as she_________.
A.return B.will return C.returns D.returned
13.great changes_________in shanghai in the past twenty years.
A.has taken place B.have taken place C.had taken place D.took place
14.i wonder if chris_______to see me tomorrow. If she__________i will take her to the garden.
A.will come…will come B.comes…comes
C.will come…comes D.comes…will come
15.the story_______to one of my friends three years ago.
A.was happened B.is happened C.happened D.happening
18.by the end of the coming2003, the foreigners here________all parts of china.
A.have visited B.will have visited C.will visit D.will visit
21.the famous singer________here if he comes here.
A.will welcome B.will be welcome C.is welcome D.welcome
请从语法的角度详解。。。非常感谢~

Answer 1

12 选 C， 这是时间状语从句的考点，主句用一般将来时，从句就用一般现在时表示将来动作，而不用直接用将来时。
13. 选 B， in the past twenty years这个状语要求用现在完成时态，changes是复数，所以谓语要用have，而不用has
14 选 C， 第一个是宾语从句，时态要保持一致，时间状语为tomorrow，所以用will come一般将来时态，而另外一句是考察if引导的条件状语从句，if从句用一般现在时表示将来，主句用一般将来时态。
15 C， happen是没有被动语态的，再从时间状语three years ago 判断这是个过去时，所以选happened
18 选 B， by the end of 这个时间状语判断，这里要用现在完成时，再从 the coming2003 判断，要用一般将来时，所以综合起来要用will have visited
19 B， 同样的是考察if条件状语从句的用法。 If从句一般现在时，主句一般将来时。