He pretended _____ an important paper when the boss entered.

He pretended _____ an important paper when the boss entered.

A．to read           B．to be reading       C．to have read       D．to have been reading

He pretended _____ an important paper when the boss entered.

1. A.
   to read
2. B.
   to be reading
3. C.
   to have read
4. D.
   to have been reading

 He pretended _____ an important paper when the boss entered.

   A. to read              B. to be reading           C. to have read   D. to have been reading