It s a very interesting English question.,It s a pity that I don t have a poor vocabulary.。。

I'll take a few off-the-beaten-path ones:

gern.A woe (inhabited by Mongolian nomads, made of felt or animal skins).

n.Sorrowful. wether

n.Stewed, castrated ram.

ortn.Leftovers, scraps.

Does theok have to be in order?

If you don't press, there's more.

WHO and so on.

"Cool", "clone", "geek", "blogger", hip-hop

hormone.

Gene, sofa, microphone, golf, chocolate, brandy, romantic, coca-cola

olympic

coffee

Coca-Cola Coca-Cola.

Olympic Olympiad.

romantic romance.

coffee.

calories.

Yoga Yoga.

Google Google.

hippies.

Yuppies yuppies.

And all the country names.

Tofu tofu.

typhoon).

This seems to be a transliteration of a foreign language, so I don't know if it counts.

Coca-Cola Coca-Cola.

Hysteria hysteria.

Olympic Olympiad.

romantic romance and many more.

Chocolate

Sofa sofa

Humor

Logic

Romantic

No. Because you used the had studied tense, which is a perfect tense, if you change it to when, that is, it is a point in time in the past, then you have to use the past tense. Changed had studied to studied.

When is a point in time and cannot be used to indicate completion.

No, study is a continuous action.

Memorize the words. Insist on carrying 1000 a day, I hope it will be useful!

Listen and observe others during the test, and when someone hears the correct answer, they can't help but make a mark... Pay attention to the majority of people).

When you make a choice, you don't just choose C