Question

Lin Yi isn’t what it used to be．The last decade ______ great changes in the city images．

1. A.
   witnessed
2. B.
   was witnessed
3. C.
   has witnessed
4. D.
   had witnessed

Answer 1

C
考查时态。句意：Lin Yi不在是以前的样子了，最近十年已经见证了城市面貌的重大变化。动作时从过去一直持续到现在，所以选C。