—Did Jack come back early last night? —Yes, It was not yet eight o'clock _____ he arrived home.
The managers discussed the plan that they would like to see ______ the next year.
Does the way you thought of _______ the water clean make any sense?
The old professor told us every part of the materials should be made use of ______ the power station.
The boss insisted that every minute ______ made full use of ______ the work well.
Hearing the news, he rushed out, ______ the book ______ on the table and disappeared into the distance.