After suffering a heart attack, Michael Jackson was pronounced dead, ____ a tragic end to the world' s

most popular entertainer.

A. to mark

B. marking

C. marked

D. having marked

So far nothing ________ Tom.I want to know the reason ________ he hasn't written to me.  [ ]

A．heard from；why

B．has been heard from；why

C．was heard from；that

D．has heard from；that