请教专家几个问题：1、关于动词时态1）-- There is someone knocking atthe door? -- It must be the computer repairman. I ____________ (call) him to fix my computer. 请问此题时态如何确定。在具体语境（尤其是没有时间状语提示的情况下）过去...
... your friends, family members, or classmates rather than holding them
back.There is a difference
between arguing and fighting. Arguing is that you and your opponent present
your concerns and discuss the feelings and issues related to those concerns.
You can engage in an argument respectfully without...
...y just over a quarter (29%) rely only on their
smartphones, according to a survey (调查). Of those Australians who still have a
landline, a third concede that it’s not really necessary and they’re keeping it
as a security blanket—19 percent say they never use it while a further 13
percent ke...
...hat he would change his mind. 她没看到他任何改变主意的迹象。Thereareno signs of forcible entry. 没有强行闯入的迹象。I
couldn't see any signs of progress. 我看不出任何进步的迹象。The
economy is showing signs of improvement. 经济显示出了好转的迹象。If...
...ed by President Franklin Roosevelt as Director of
the Bureau of Biological Survey.Hunters willingly pay the stamp price to ensure the survival of our
natural resources.About 98 cents of every duck stamp dollar goes directly into the
Migratory Bird Conservation Fund to purchase wetlands and wildlife ...
...id. He's got a great red face like a leg of mutton, and on his right cheek there's an enormous mole with long hairs growing out of it."Strickland was in a good humour, and when Dirk Stroeve came up and sat down with us he attacked him with ferocious banter. He showed a skill I should never have cred...
So this is it—senior high school at last! I’m not outgoing so I’m a
little anxious right now. I want to make a good first impression. Will I make
any friends? What if no one talks to me?这是2019年版高中英语新教材（人教版）Welcome Unit (p4) 的第一段中的一个句子。请...
...many kinds of work for the people.
Almost all the elephants were gray. But there were some all-white ones, too.
Because they were so rare, they were never made to do any work.All of the white elephants became the
king’s elephants. He did not let them work. But he could feed them, anyway,
because h...