______ is a voiced alveolar stop.A．[z]B．[d]C．[k]D．[b]

—Smoking is forbidden in the workshop, please stop it. —Sorry, I ________________.A.a

Stop asking all these personal questions! It is bad manners to be ______.A．inquisitiveB．im

______ is the common factor of the three sounds: [p], [t], [k].A．VoicelessB．VowelsC．Voiced

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

She should stop work; she has a headache because she______too long.A．is readingB．has been

Her voice is _____.A.loudB.aloudC.loudlyD.loudness