第3题没问题,at least可以放在句中,以平衡前后句子.
类似于：I think she is over 30 years old.
顺便说一句：第5题也没问题,who is sitting besides her是定语从句修饰the boy.此句也可用动名词简单表达为：The boy sitting besides her is her son.
第3题没问题,at least可以放在句中,以平衡前后句子.
类似于：I think she is over 30 years old.
顺便说一句：第5题也没问题,who is sitting besides her是定语从句修饰the boy.此句也可用动名词简单表达为：The boy sitting besides her is her son.