I.词语辨析：
1. can / be able to
can: （主观的能力）能够、有能力
e.g. Can you translate the sentence into English?
Even a child can do such a thing.
be able to do: （客观上）能够，（经克服困难而）成功做成= manage to do / succeed in doing
e.g. I had a car, so I was able to get there in time for supper.
The fire was big, but everyone was able to leave the building.
2. gift / present
gift: 常指送给团体、机构或个人的贵重的礼品，可以是具体的，也可以是抽象的东西；
赠送gift往往被看作慷慨的行为，一般没有回赠。
present: 多指因出于好心、礼貌、尊敬等原因，送给亲友的一般的具体的礼品，价值可高可低，往往有回赠。
