【2013四川内江】The old man is a good swimmer, and even now he often swims _____ Tuojiang River after supper.
—Could I use your bike for today, Sam? —_____. I’m not using it.
—Will you stay for some more days? —Sorry, I_____. My mother called to ask me to go back at once.
—Why didn’t you go to play football with us yesterday afternoon? —I _____my mother with the housework then.
We can easily become unhappy_____ we work out our problems in our daily life.
I’ll never forget the day_____ the great scientist came to our school and gave us a speech.