Passage 2
Imagine a customer visiting your website for the first time. He's on the verge of buying a product or using a service when something on your cite confuses him. He doesn't know how to proceed. Sure, he can get help via email or a list of

Passage 2
Imagine a customer visiting your website for the first time. He's on the verge of buying a product or using a service when something on your cite confuses him. He doesn't know how to proceed. Sure, he can get help via email or a list of answers to frequently asked questions, but he wants a live person to assist him. If you don't provide this option, you'll likely lose that customer.
And a toll-free telephone number often won't do the trick, because the typical customer has only one home phone line, accesses the Web through it, and won't gladly log off Intemet to call for help.
Many companies are 【enhancing】 their sites with support features that allow real-time commurication over the Intemet. The tools available range from text chat to page pushing, voice over IP(volp), shared browsing,call- back, or combination. In most cases,you needn't install new set of servers to handle these solutions. Several vendors offer these tools as hosted services, for which you pay a monthly fee, and add a few lines of HTML to the code for your site.
17.Text chat, page pushing, Voice over IP(VoIP), shared browsing, and call-back technology are some kinds of ______.

A.tools for repairing computers

B.online real-time communication

C.technology combinations

D.solution handling problems

正确答案是B