阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出最佳选项。
Mrs. Black works in a big city hospital, she is a popular _________. Every day there are so many patients who need her to treat (治疗). She is so _________ that she has no time to do some shopping. But she often needs to buy many things _________ her family. She has to buy everything online. Sometimes she buys something to cook in the _________.
_________ she gets home from work, she usually _________ the computer and begins to do something online. Today is November 11th, she is sitting before the _________ now. There are all kinds of _________ on the screen of the computer. She wants to choose a right shirt for her _________, Lucy. She is a seven-grade student. She thinks it’s not safe to shop online, so she often asks her mother not to __________ anything online. Mrs. Black still does the online shopping. She enjoys it and she thinks it’s convenient (方便的).
She usually __________ about an hour on the online shopping on the Internet. She says she can __________ the different prices of the same product, __________ then she can buy the cheapest one.
__________, she didn’t do the online shopping this morning. That was because __________ computer didn’t work.
16. | A．teacher | B．worker | C．doctor | D．cleaner |
17. | A．interested | B．relaxed | C．free | D．busy |
18. 19. | A．bedroom | B．park | C．garden | D．kitchen |
20. | A．If | B．After | C．Before | D．Because |
21. | A．pays for | B．worries about | C．turns on | D．looks for |
22. | A．television | B．telephone | C．notebook | D．screen |
23. | A．food | B．drinks | C．clothes | D．books |
24. | A．daughter | B．son | C．brother | D．husband |
25. 26. | A．takes | B．spends | C．pays | D．costs |
27. | A．receive | B．share | C．collect | D．compare |
28. 29. | A．However | B．Then | C．Finally | D．Luckily |
30.
