Please do me a favor —_____ my friend Mr. Smith to Youth Theater at 7:30 tonight.
------- Will you pass me the newspaper?--------___________
His laziness ___________it hard for him to study well.
______________ is quite obvious that there is no water on the Mars.
To qualify yourself for this kind of new job, I recommend that you ________ some on-line course.
Students are encouraged to _________ the design competition for robots at the university.