(5).  The most important rule for Mary to follow in treating her guests is to________.(本题2.0分)

(1).  When speaking on the phone, the essential factor for successful communication is your _______.(本题2.0分)

(2).  To give important information, a person on the phone should _________.(本题2.0分)

(3).  The speaker is advised to speak slowly in order to help the listener _______(本题2.0分)

(4).  To avoid mispronouncing unfamiliar words, you are advised to ________.(本题2.0分)

(5).  Speakers sometimes need to spell some words to help listeners to understand _______.(本题2.0分)

(2).  "First aid is ... open to human error" in the second paragraph means ______.(本题2.0分)

(3).   An air of confidence and safety is important in giving first aid because the casualty needs to feel to be ________.(本题2.0分)

(5).  The best title for the passable could be _______(本题2.0分)

The classroom needs_________.

(单选题)现代色彩中的无彩色系是指____、_____、_____。() (本题2.0分)

   Our classroom needs _______ as it has got so dirty( )