1. too, for, us, to
2. fun, give, up, smoking
3. protect, from, hundred, old
4. was, surprised , , what , saw
5 it , to , learn , well.
1. 考查too +adj+for sb+to do对某人来说做…是如何的：too, for, us, to
2. fun,是不可数名词，“有趣的事情”戒烟： give, up, smoking
3. 考查词组：保护某人免受….protect, from表示：300用three hundred,hundred用单数，…years old多大了，
4. 考查形容词做表语：was, surprised 感到惊奇，用过去时, , what she saw 是宾语从句，what做saw的宾语，
5考查句意：think it+adj+to do 认为做…任何…,it是形式宾语，不定式是真正的宾语it , to , learn , well.