It was not _______ she took off her dark glasses _______ I realized she was a famous film star.

I _____ you some money, but I hadn’t any on me then.

It was foolish of you to take a taxi ______you could walk there in five minutes

8, three American scientists invented ____transistor, which is ____ small electronic device to control an electriccurrent

Everyone in China tried ______ something for the Beijing Olympic Games.