I have been doing my lessons every day for 10 years now. Everyone knows that it takes more than one hour to complete homework. In order to complete the lessons more interestingly, I developed the following system for myself: I turn on my playlist of songs and proceed with homework. First, I perform lighter exercises that I understand better. Then more difficult, after each difficult lesson I take a five-minute break. At the very end, I teach classes where you need to read or learn (I always teach while moving around the room). Thus, I do homework much more pleasantly and more interestingly, because: firstly, I listen to music that calms me and, secondly, my brain does not get tired of stress.
It __can't_ be true. I don’t believe you!
Mike must___ be at the university right now. I saw him 10 minutes ago.
John ___may be a teacher. I don’t really know.
This can't___ be my towel. I can’t recognize it.
She ___must___ be playing the piano now. I can hear music.
This milk ___may go off if you don’t put it into the fridge.
She ___must have been at the meeting when I called her.
They ___may have left for London last week, they didn’t tell me.
She must___ have been running very fast. She was totally out of breath.
Helen has no friends. She ___must be very lonely.