Carbon dioxide_______from burning fuels is&n-考呗网

单选题 Carbon dioxide_______from burning fuels is the most common of the socalled greenhouse gases.

A． producing
B． having been produced
C． to be produced
D． produced

【答案】D。解析：从燃烧的燃料所中产生的二氧化碳是所谓的二氧化碳温室气体中最常见的。过去分词produced表被动，故选D。

1 The manager _______the workers how to improve the program since 9 a.m.

A． has told
B． is telling
C． has been telling
D． will have told

2 I like such houses with beautiful gardens in front, but I don't have enough money to buy

A． it
B． one
C． that
D． this

3 The beautiful mountain village_______we spent our hohday last year is located in _______is now part of Guangxi.

A． which ; where
B． where; what
C． that; what
D． when; which