NAM LEARNED SWIMMING 8 YEARS AGO.A. NAM HAS BEEN ABLE TO SWIM FOR...

14. - BAI KIEM TRA SO 5TA 11 NC
BAI KIEM TRA SO 5TA 11 NC
14. Nam learned swimming 8 years ago.A. Nam has been able to swim for 8 years. B. Nam can swim 8 years ago.C. Nam could have swum for 8 years. D. Nam has been able to swim since 8 years ago.