1.B which指work,逗号隔开,用which
2.D 之前面一句话的事实
3.B serve the customers with patience.with是介词,用which
4.B at the age
5.A node to to前置,介词,用which
1.B which指work,逗号隔开,用which
2.D 之前面一句话的事实
3.B serve the customers with patience.with是介词,用which
4.B at the age
5.A node to to前置,介词,用which