—Why are your eyes so red? You ________ have slept well last night?—Yeah, I stayed up late writing a report.
It might be very difficult to find the ____ of the information.
Even though she has many ______, I _______ any less.
We have to ______ a time to discuss the matter again.
Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company .
The athlete fell off his bike when he _____ down the hill.