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The biggest research centre in russia (to be) the russian Academy of Sciences
Every student (to be) interested in this problem last year.
The (to be)at the plant tomorrow.
We (to be) in the laboratory now.
You (to be) in there chemical laboratory a week ago? - No we (not to be). We (to be) there only the day after tomorrow.

I have so many school holidays and was recently a holiday Hellouin. They were all dressed so scary and funny dyed. All prazdnyvali with joy this holiday was so fun and funny all ate delicious food, played in all sorts of interesting games, laughing and some even told strshilki and then all went to ulittsu and we blew firecrackers. Well, then it was dark and we had to go home and it's not like the end carried a delicious cream cake we gladly eaten and razoshlisvse home. Here's a fun and a bit frightening was a celebration in our school. , frightening prozdnik was in our school. Про Хелоуин)

On Saturday morning, Aunt Polly sends Tom out to whitewash the fence. Jim passes by, and Tom tries to get him to do some of the whitewashing in return for a “white alley,” a kind of marble. Jim almost agrees, but Aunt Polly appears and chases him off, leaving Tom alone with his labor.
A little while later, Ben Rogers, another boy Tom’s age, walks by. Tom convinces Ben that whitewashing a fence is great pleasure, and after some bargaining, Ben agrees to give Tom his apple in exchange for the privilege of working on the fence. Over the course of the day, every boy who passes ends up staying to whitewash, and each one gives Tom something in exchange. By the time the fence has three coats, Tom has collected a hoard of miscellaneous treasures. Tom muses that all it takes to make someone want something is to make that thing hard to get.