Question

---Whose shirt is this?
---It ______ be Li Lei’s. It is too big for him.

1. A.
   could
2. B.
   must
3. C.
   can’t
4. D.
   might

Answer 1

C
考查情态动词。句意：——这件衬衫是谁的？——不可能是李雷的，它太大了。选C。