We are preparingprograms to celebrate our country’s ________ birthday.
句意：我们正在准备庆祝我国70岁生日的节目。
A. seventy七十；B. seventieth第七十；C. seventeenth第十七。表示某人的第几个生日用序数词，这里是说七十岁生日用seventieth，根据题意，故选B。
We are preparingprograms to celebrate our country’s ________ birthday.
—I like number “9” best,because I think it stands for “long lasting”.
—Me too. So I chose ________ floor to live on.
Please pass me_________book on the right.
— What did the teachersay?
—He told us to go over__________lessons.
Jack is going to be anolder brother. His parents are planning to have their________child.
The new bridge is________ metres long.
—What's the key to success, Dad?
—More time and hard work, ________ you'll make it one day.
Alice can sing some English songs, _______ she can’t play the guitar.
You must make sure your mask (口罩) is clean ________ you put it on.
_________he was poor himself, he tried his best to help the people in need.
