How long do you want me to heat the oil?—Heat it till itto smoke

I know MrShuili; we ______ to each other at an English lecture

Henry must have stayed up last night, ________ he looks so tired and sleepy

81. Male and female students are quitedifferent from each other ______ the age at which they begin to develop anintellectual self-discipline.

Why, David, you look so tired! –Well, I ______ a report for the whole dayand I must finish it tomorrow.