___________ many times, but he still couldn’t understand it.
--------You seem to show interest in cooking.-------------_________? On the contrary, I’m tired of it.
He convinced me __________the difficulty of the work.
East of the lake__________, one of which is twice the size of the other.
The room, although_________ to be kept locked, was often left open.
-----I am sorry for having been so rude to you.---------That’s OK. I am sure you didn’t___________.