【小题1】We must learn and help each other such as ( 互相 ).
【小题2】The shop sells (出售) many school things, is free doing shopping ( 例如 )pens, pencils，rulers, erasers and so on.
【小题3】She has to ( 有空 ) on Saturdays.
【小题4】Mrs. Smith likes some ( 购物 ) on Sunday morning.
【小题5】Li Lei ( 不得不) go to school on foot today because his bike is broken.
网友回答
解析：
【小题1】考查固定短语。“互相”是each other。句意“我们必须学会相互帮助。”故填each other。
【小题2】“例如”用such as或for example。for example后需要用逗号，排除。故填such as。
【小题3】考查固定短语。be free“有空”。She是第三人称，故用is。故填is free。
【小题4】考查固定短语。“去购物”用do some shopping。故填doing shopping。
【小题5】“不得不，必须”用must或have to。Have to表示客观原因，常意为“不得不”。主语是第三人称单数，故用has to。