Between the two roads ________ a TV tower called“Skyscraper Tower”.
| A．stands | B．standing | C．which stands | D．stand |
It is hard for us to eat better, exercise more, and sleep enough, ________ we know we should.
| A．since | B．even if |
| C．unless | D．as if |
At the conference, they came up with three different _____ to solving the serious problem.
| A．approaches | B．means |
| C．methods | D．ways |
The music brought the days back to me _____ I was out of work wandering hopelessly on the streets.
| A．until | B．that | C．when | D．which |
Jack is the right person you can rely on to ____ the research when you are on vacation for the next two weeks.
| A．carry on | B．focus on |
| C．take up | D．insist on |
He failed the final examination and only then ____ how much time he had wasted.
| A．he realized | B．had he realized |
| C．he had realized | D．did he realize |