Friendship is unconditional and uncritical, based only on mutual respect and the ability to enjoy each other's company. These authority figures never saw the way one of us could do something outrageous, and the rest of us would joke about it for days. We could have fun doing absolutely nothing at all—because the【C1】______we provided each other with was enough. Rather than discussing operas, Lewinsky, or the weather, we enjoyed just【C2】______each other without any one of us trying to outsmart the others. Still, I realize that these adults had a【C3】______to be concerned about the direction my friends were【C4】______: I also was concerned for them, but I wasn't about to【C5】______them. Many times I would advise my friends that some activity may be【C6】______or to think things through before doing something, but I would never claim to hold the moral high ground and to condescend to them. When Marvin would begin rolling joints, when Alisa would tell me she skipped school because of a hangover, or when Merriam would tell me that her new boyfriend was in a street gang, I expressed my discomfort with their【C7】______However, I never【C8】______them with the threat of taking my friendship away. Contrary to the commercials on television, you can have【C9】______who use drugs. In fact, probably everyone does without【C10】______it.

When traveling, you are advised to take credit cards, ______is more convenient than carrying money in cash.

Ashley is very showy and she always wants to be the______of attention in public.

Many schoolteachers say that as difficult as their students can be to deal with, parents can be even worse. Some parents are quick to【C1】______and protest when their son or daughter gets in trouble or performs poorly on a test. For example, a Time magazine report【C2】______one college professor who has had students who " call their parents from the classroom on a cell phone to complain about a low grade and then pass the phone over to her,【C3】______class, because the parent wanted to intervene. And she has had parents say they are paying a lot of money for their child' s education and【C4】______that anything but an A is an unacceptable【C5】______on their investment." Such parents are doing their children no favors. In fact,【C6】______" rescuing" their children, they are preventing them from " having real experiences of decision making, failing, and【C7】______their own messes," writes the report. The author adds: " If parents run too much interference【C8】______problem solving for their children while the children sit back and do【C9】______the parents will get stronger,【C10】______the children get weaker and fall over when they try to run on their own."

In 2013, physical health______its lowest point in the past six years, largely due to rising rates of overweight.

I would have joined him in a picnic, but I______his company.

The discovery of these tombs is______for scholars'studying Chinese history.

The measure you proposed______what is expected.

When Jenny came to my place, I______ breakfast with James.

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______objects in the distance is made possible with the help of a telescope.

The police______the lost boy in the forest.

John______away for the last two days but he should be back tomorrow.

Sam: I don't drink coffee at all. Frank: ______.

If the south had won the war, what is now the United States______divided into several countries.

他是第一个在月球上行走的人。

( )that John should have passed the examination.

The doctor advised her that she______enough rest before going back to work.

Experienced teachers make______mistakes than beginners.

Our customers would______it very much if the salesperson could give them clear directions to operate the machine.