115. The conductor felt terrible on the way to Wuhan. The underlined word means ____.
Try to spend your time just on the things you find _________.
On snowy days, you have to drive very_________to avoid traffic accidents.
— You may find the key to the maths problem on page 107. — Ah, it’s so simple. I wonder why I_________of that.
The long and tiring talk, filled with arguments and quarrels, ended in disorder, _________ no agreement at all.
Many people in the city wonder _____the city officials have the information they need to solve the problem.