.   The missing boys were last seen   _______   near the river.

.   Charles Babbage is generally considered _______    the first computer.

.    They would not allow him _______   across the enemy line.

. He pretended _______   nothing about it.

. ---I usually go there by train.  ---Why not   _______     by boat for a change.

. ---Will the Smiths go abroad this summer?              ---No, they finally decided  _______  .

.    He didn’t know  _______    or stay.

.  I went to see him,  _______    him out.

1. I’ve heard him  ______   about you often.
2.

. ___________    the classroom, the students went to the playground to watch the football match