单句语法填空
1．John has three sisters. Mary is the ________ (clever) of the three.
cleverest [设空后的of the three表示三者，因此暗示要用形容词最高级。]
2．Walking may be boring at times, but on a clear sunny morning nothing could be ________ (good)．
better [nothing could be better“再好也没有了”，比较级表示最高级含义。]
3．Nadine can not only remember people she has met before, but she can recall things that she said at ________ (early) conversations.
earlier [根据句意可知，此处指“更早的交谈”，故用比较级earlier。]
4．The Hong KongZhuhaiMacao Bridge, as the _______ (long) crosssea bridge in the world, is expected to have 5G service in the future.
longest [“世界上最长的跨海大桥”，应使用最高级，故答案为longest。]
