she is tired.she can't walk any longer(合并一句) she is ()tired()walk any longerthe problem was too differcult for us to work out(句意不变)the problem was ()differcult that()() work out
问题描述:
she is tired.she can't walk any longer(合并一句) she is ()tired()walk any longer
the problem was too differcult for us to work out(句意不变)
the problem was ()differcult that()() work out
答