Digging the foundation is the first ______ of our building project.

You are not allowed to take a second job ______ your employer gives you permission.

His health deteriorated rapidly due to insufficient nutrition and______medical care.

One third of the Chinese in the United States live in California, ______ in the San Francisco area.

Racket, din, clamor, noise

Discoveries in science and technology are thought by "untaught minds" to come in blinding flashes or as the result of dramatic accidents. Sir Alexander Fleming did not, as legend would have it, look at the mold on a piece of cheese and get the idea for penicillin there and then. He experimented with antibacterial substances for nine years before he made his discovery. Inventions and innovations almost always come out of laborious trial and error. Innovation is like soccer; even the best players miss the goal and have their shots blocked much more frequently than they score. The point is that the players who score most are the ones who take most shots at the goal and so it goes with innovation in any field of activity. The prime difference between innovators and others is one of approach. Everybody gets ideas, but innovators work consciously on theirs, and they follow them through until they prove practicable or otherwise. What ordinary people see as fanciful abstractions, professional innovators see as solid possibilities. "Creative thinking may mean simply the realization that there's no particular virtue in doing things the way they have always been done," wrote Rudolph Flesch, a language authority, this accounts for our reaction to seemingly simple innovations like plastic garbage bags and suitcases on wheels that make life more convenient: "How come nobody thought of that before?" The creative approach begins with the proposition that nothing is as it appears. Innovators will not accept that there is only one way to do anything. Faced with getting from A to B, the average person will automatically set out on the best-known and apparently simplest route. The innovators will search for alternate courses, which may prove easier in the long run and are bound to be more interesting and challenging even if they lead to dead ends. Highly creative individuals really do march to a different drummer. What does the author probably mean by "untaught mind" in the first paragraph?

I spent the whole day yesterday rearranging my books______their subjects and frequency of use.

He promised me a letter; he ought to ______ it days ago.

One of the responsibilities of the Coast Guard is to make sure that all ships______follow traffic rules in busy harbors.

人工智能和虚拟现实是两种与电脑有关的技术，它们可能对教育产生重大的影响。许多教学计划可以不用人力制定

I just managed to ______ a quick breath before I was sucked under the water by the passing boat.

The senator agrees that his support of the action would ______ his chances for reelection.

Over the past century

We thought of selling this old furniture

Which of the following statements is INCORRECT about Kathy's work?

The ______ of our trip to London was the visit to Buckingham Palace.

______ of half-starving wolves were roaming the snow-covered countryside.

The man went to prison, but the two boys______with a warning.

When we do planning, we should take all relevant factors into consideration in order to ______

In bringing up children