David worked hard at his lessons ____ he gained high grades in the exams.
The foreign friends you referred to ______ looking forward to ______ around our school.
I prefer studying English at home ______ the match.
Most children need encouragement in time of failure ______ they can cheer up again.
–Whose advice do you think I should take? –______.
From his ______ look, I could see that he didn't believe what I said.