____ the temperature down day by day, the leaves are turning yellow.
I’dliketoknow______Chinese.
Was it 80 years before Christopher Columbus crossed the Atlantic ______ Zheng He hadsailed to East Africa?
Time should be made use ______ meaningful things.
Last night, your mobile phone was always busy. I couldn’t ______ to you after several attempts.
At this time next year______ our holiday in Beijing..