Computers are of great to the development of science and
technology.
| A．benefit | B．patience | C．interest | D．influence |
In many places in China, ___ bicycle is still ___ popular means of transportation.
| A．a; the | B．/; a | C．the; a | D．the; the |
______ apple fell from the tree and hit him on ______ head.
| A．An; the | B．The; the | C．An; 不填 | D．The; 不填 |
In the United States, there is always ____ flow of people to areas of ______ country where more jobs can be found.
| A．a; the | B．the ; a | C．the; the | D．a; a |
I ate _________ sandwich while I was waiting for _________ 20:08 train.
| A．the, a | B．the, the | C．a, the | D．a, a |
--- I am so sorry to have come late for the meeting.
--- It is not your fault. With __ rush-hour traffic and __ heavy rain, it is no wonder you were late.
| A．a; a | B．the; the | C．/; / | D．/; a |