Now and then he will go to a ball game.

Now and then they would ________ our house and have a talk with us．

1. A.
   call on
2. B.
   drop in at
3. C.
   drop in on
4. D.
   drop in

Now and then they would  ______ our house and have a talk with us.

    A. call on                   B. drop in at

    C. drop in on                D. drop in

Now and then they would  ______ our house and have a talk with us.

A. call on         B. drop in at       C. drop in on           D. drop in

 Now and then they would  ______ our house and have a talk with us.

A. call on                   B. drop in at                C. drop in on                D. drop in