______ is a voiceless labiodental fricative.A．[f]B．[d]C．[g]D．[v]

The UK is a country that is__________. 查看材料A.faster

Among the following sounds, ______is a voiceless alveolar fricative.A．[z]B．[s]C．[f]D．[v]

－－What is your eldest sister like？－－ ______________.A.She is happyB.She is illC.She is

___________ is unknown to me.A.Where he isB.Where is heC.He is whereD.Is he where

--Is she a bus driver? --_________.She is a postwoman.

--What is your eldest sister like?-- ______________.A.She is happyB.She is illC.She is