The old lady ______ the girl ten Yuan for washing windows, most of ______ hadn't been cleaned for a long time.
The experiment turned out to be__________failure, but “________failure goes before success” A a , a B /, / C a , / D / , a
.Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
. We all hope that the flame will not _____ in such cold weather.
You are not in good health, I think. You could improve your _____ by running every day.
You can do whatever you like _______ you follow the school rules..