A. Building a new generation weather radar monitoring network in China can obviously improve the landing position of tropical cyclones or typhoons.

Analysis of test questions: in option A, the verb-object collocation is improper, the collocation of "improvement" and "accuracy" is improper, and "improvement" is changed to "improvement"; Option c is illogical and cannot form a turning point. The subject of "love writing" is "author", and the subject of "but a" should be "Jane? The two subjects of "love" are inconsistent and cannot constitute a turning point. Add "write about her" after "but"; Option d is the inversion of subject and object, and "Lai Yan" is added after "He".