Question

—________I have lunch now, Mom?
—No. You must wash your hands first

1. A.
   Would
2. B.
   May
3. C.
   Ought to

Answer 1

B
Would将要，会；May可以，可能；Ought to应该。句意：妈妈，现在我可以吃午饭了吗？——不，你必须先洗手。结合语境可知选B。
考点：情态动词辨析