My parents and I couldn’t get into the house last night because________of  us had the key.

• A、all

• B、either
  

• C、neither 
  

• D、none

What did Peter do after his father died?

• A、He worked at a market

• B、He learnt to draw pictures.

• C、He started his own business.

• D、He continued his college studies.

S: I’m sorry. Professor Johnson is not here at the moment. This is his assistant, Sally.  _____52_____?