Asmoreandmorecarsareproducedandused，theemissionfromthei...

问题详情：

As more and more cars are produced and used，the emission from their exhaust­pipes contains an even larger volume of        gas.

A．poisonous                       B．various

C．continuous                      D．delicious

【回答】

A

知识点：形容词

题型：选择题