Good travelers don't leave __________ on trains or airplanes.-考呗网题库移动版

单选题 Good travelers don't leave __________ on trains or airplanes.

A．rubbish
B．litter
C．garbage
D．pollutant

参考答案B

解析:

单选题 The first sentence in this paragraph is __________; it can be interpreted in many ways:

A．intricate
B．ambiguous
C．duplicated
D．confused

单选题 If a substance is dissolved in water or heated, it may __________ a gas.

A．give into
B．give over
C．give off
D．give away

单选题 In recent years much more emphasis has been put __________ developing the students' productive skills.

A．onto
B．in
C．over
D．on