--- What’s the matter with you?
--- _________ the window, my finger was cut unexpectedly.
| A．Cleaning | B．To clean |
| C．While cleaning | D．While I was cleaning |
A dark cloud is a ________ of thunderstorm.
| A．symbol | B．sign | C．mark | D．signal |
________ the Internet is bridging the distance between people, it may also be breaking some homes or will cause other family problems.
| A．When | B．While | C．If | D．As |
--The English exam is not difficult, is it?
--________. Even Tom ________ to the top students failed in it.
| A．Yes; belongs | B．No; belonged | C．Yes; belonging | D．No; belongs |
London is a most beautiful city, ________ the River Thames.
| A．located in | B．lied on | C．situated on | D．stood in |
Great ________ should be made to speed up higher education to meet the needs of industry and agriculture.
| A．measures | B．goals | C．efforts | D．effects |