单选题 To give important information, a person speaking on the phone should .

单选题 To avoid mispronouncing unfamiliar words, you are advised to .

单选题 The speaker is advised to speak slowly in order to help the listener to .

单选题 When speaking on the phone, the essential factor for successful communication is your .

单选题 To give important information, a person speaking on the phone should .

单选题 When speaking on the phone, the essential factor for successful communication is your .

单选题 Speakers sometimes need to spell some words to help listeners to understand

单选题 The speaker is advised to speak slowly in order to help the listener to .