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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

27. 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