LUCI Exercise 2. Open the brackets using the necessary form of infinitive.
1. Oh, you are all in snow, you look like a snowman. It must (to snow)
heavily.
2. Look, what huge snowdrifts there are everywhere, and the path is
covered with knee-deep snow. It must (to snow) for several hours
already.
3. You look fresh. You must (to have) a good sleep at night.
4. He knows mathematics much better than he did last year. He must (to
work) a lot in summer.
5. Where is Peter? - Oh, he must (to read) in the library.​

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