单项选择题
In order to improve your communication skills, we will show you how to learn（）about your customers than you know now.
A．many B．much C．most D．more
单项选择题 Since the new technology was introduced last month, we（）in speeding up production.
单项选择题 Before the age of the Internet, we used to（）our holidays through travel agents.
单项选择题 Now the air pollution in this city（）more and more serious with each passing day.
