He worked hard at his study, and _______, he passed the exam easily.

Why are your eyes so red？You________have slept well last night.—Yeah，I stayed up late writing a report. (

Tom’s decided to devote all he could ________ his English before going abroad.

I could just see a car in the distance, butI couldn’t _____ what color it was.

_______ your mind and study hard, and you will be sure ________English well.