1. While I_____(walk) to school, I_____________(see) a rainbow.

• was walking/ saw

• walked/ was seeing

She______(read) a book when the
phone______(ring).

• was readying/ ran

• read/ was ringing

They_______(play) soccer when it _____(start) to rain.

• played/ was starting

• were playing/ started

I ________(watch) TV while my mom_____ (cook) dinner.

• was watching/ cooked

• watched/ was cooking

While Tom______
exams, his friends ______ outside.

• was studying/ were playing

• studied/ played

The students______(discuss) the

project when the teacher ________(enter) the classroom.

• were discussing/ entered

• discussed / was entering

While I______ (work) on my

project, my computer_______ (crash).

• worked/ was crashing

• was working/ crashed

While John______(read) the news,

his wife _____(cook) dinner.

• was reading/ cooked

• was reading/ was cooking

She______(watch) TV when the

power _______(go) out.

• was watching/ went

• was watching/ was going

The teacher ______(explain) the

lesson when the fire alarm____ (go) off.

• Explained/ went

• was explaining/went