— What did the teachersay?
—He told us to go over__________lessons.
句意：——老师说了什么？——他让我们复习前三节课。
考查数词表达。“定冠词the+序数词first”表顺序，即起初的，最先的，修饰名词three lessons，即the first threelessons前三节课。故选D。
— 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.
______you smile at others, they will smile back.
—Michael, shall we go hiking in the mountains next Sunday?
—OK, ________it rains heavily.
The young men all shouted “Happy New Year” _______it was twelve o’clock.
