Question

“Tom, ________ afraid of speaking in public．You are no longer a small boy, said Mum．

1. A.
   not be
2. B.
   not to be
3. C.
   be not
4. D.
   don't be

Answer 1

D
祈使句中是形容词，用be做动词，否定形式加Don't，所以选D．