单项选择题

Since the new technology was introduced last month, we ______ in speeding up production.

A．succeed
B．succeeded
C．have succeeded
D．will succeed
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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
Before the age of the Internet, we used to ______ our holidays through travel agents.
A．book
B．having booked
C．booking
D．have booked
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