Fill in: a) can’t, might, must or could. i wonder where paul is. he ………… be at work because he never works on a sunday. he ……….. be at sally’s, but i doubt it because they haven’t been speaking lately. i wonder if he ………… be at his cottage in the country. no, he ……….. be because he told me they have rented it to someone else for the summer. he ……… be at the bowling club, but i’m almost sure he told me he’d got tired of it. i know! he …………. be on the beach, because i remember him asking me if i wanted to go with him

He can't be at work because he never works on a sunday. he might be at sally's, but i doubt it because they haven't been speaking lately. i wonder if he could be at his cottage in the country. no, he can't be because he told me they have rented it to someone else for the summer. he might  be at the bowling club, but i'm almost sure he told me he'd got tired of it. he must be on the beach, because i remember him asking me if i wanted to go with him.

some people think that it is necessary to change something in education to make it more useful and interesting. but others think it is unnecessary. in my opinion, school trips can be very useful for education. children spend more time in a fresh air; they will be healthier and energetic. furthermore, different trips can make process of studying more exiting and more interesting. pupils see everything with their own eyes. i think it is better to see, to touch and to feel than to read. pupil will remember everything very well. however, some opponents say that school trips are real waste of time. this is not true, because pupils will have an opportunity to broaden their mind. also some people suppose that a lot of parents will not let their children to go somewhere, because they think that it can be dangerous. i am sure that teachers will provide security and safety to children and there are no reasons for worries. to sum up, some people think that school trips are useless and dangerous but the vast majority would disagree. to my mind school outings can be very educational and pupils really enjoy it.