You think your ruler is very long,but his is _________yours.
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..
—Would you like to come to my house to watch the Voice of China together?—______.