You should finish your lessons _______ you go out to play.
A. before
B. after
C. when
D. while
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_______ I felt very tired, I tried to finish the work.
Although
Because
C. As
D. As if
I was ____(convince) that we were doing the right thing.
The medicine is ____(on sale) at any chemist’s. You can get it easily.
She is trying to ____(persuade)the customer to buy this expensive car.