[译] 虽然那位外国人住在中国将近一年了，但他用筷子还不太熟练。
[误] The foreigner is still awkward at his chopsticks though he has lived in China for almost a year.

[正] The foreigner is still awkward with his chopsticks though he has lived in China for almost a year.
[注] 表示“对……不熟练”，应该说 be awkward with. . . ，其中介词是 with，不能用 at。