Zhng Ming hs lerned English for two yers, but he cn ______ understnd ntive spekers.hrdlyBZ

A. 起效时间
B. 疗效持续时间
C. 作用残留时间
D. 最大效应时间

uchs he ________ he hs good commnd of English, he sometimes feels it hrd to findnpproprite version for some Chinese idioms.nnounces B．declres C．clims D．confirmsA．announcesB．declaresC．claimsD．confirms