4: 在他3岁的时候，父亲去世了，母子俩无依无靠，处境更加艰难。
A: At the age of three, he lost his father. With no one to support them, mother and son found life still more difficult.
B: When he was three, his father died; he and his mother were in a difficult situation as there was nobody to support them.
C: At the age of three, he lost his father; he and his mother were in a difficult situation as there was nobody to support them.
D: At the age of three, his father died. With no one to support them, mother and son found life still more difficult.
(责任编辑：admin)有不懂可以加客服微信：vq800020900 咨询
