“The day is coming ________ telegraph wires will be laid on to houses like water or gas.” Bell wrote to his father.

“The day is coming ________ telegraph wires will be laid on to houses like water or gas.” Bell wrote to his father.

1. A.
   when
2. B.
   that
3. C.
   in which
4. D.
   on that

“The day is coming ________ telegraph wires will be laid on to houses like water or gas.” Bell wrote to his father.

A. when          B. that              C. in which                D. on that  

“The day is coming ________ telegraph wires will be laid on to houses like water or gas.” Bell wrote to his father.

 “The day is coming ________ telegraph wires will be laid on to houses like water or gas.” Bell wrote to his father.

A. when         B. that           C. in which           D. on that