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A:How much time do you spend online every day?
B:Oh, it's hard to say. Sometimes I'm too busy to go online. Sometimes I spend more than four hours online. How about you?
A:It depends. I'd say from half an hour to three hours.
B:What do you usually do online?
A:I listen to music, stream videos, or look up information. And you?
B:Lots of things. I especially like to chat with my friends and family. By the way, what's your favourite app?
A: Well, …
landmark显而易见的地标，路标;
identity身份;
access通道，入口；
milestone里程碑，划时代的事件.
Content words are words with specific meanings, such as nouns, adjectives, adverbs, and main verbs (those without helping verbs.)
Function words include determiners, conjunctions, prepositions, pronouns, auxiliary verbs, modals, qualifiers, and question words.
1.He's a natural with any kind ofengine .
2. The author has gone through so many hardships that he has written such a goodblog post.
3. Seeing other kids casting small stones into the stream(小河)，the little boy also tried to do the same.
4. Nowadays, more and more people like chatting on the Internet.
5. Can you provide any proof of identity?
