Up to now he most of the works by Mark Twain.A. is readingB. has readC. will readD. read

问题补充：

Up to now, he most of the works by Mark Twain.

A. is reading

B. has read

C. will read

D. reads

答案：

A. is reading

(答案→)B. has read

C. will read

D. reads

解析： 考查时态。句意：直到现在他已经读了马克吐温的大多数作品。Up to now直到现在，现在完成时态的标志，所以选B。