AIDSissaid的精選

問題詳情：AIDSissaid__________thebiggesthealthchallengetobothmenandwomeninthatareaoverthepastfewyears. A．thatitis       B．tobe          C．thatithasbeen   D．tohavebeen【回答】D知識點：不定...

問題詳情： AIDSissaid______thebiggesthealthchallengetohumanoverthepastfewyears.A.thatitis    B.tobe               C.thatithasbeen  D.tohavebeen【回答】D知識點：非謂語動詞題型：選擇題...