Ｉfind it hard (1) to concentrate/focus(1) under great pressure.(1)
2. The increasing population (1) is a great drain on (1) the limited resources (1)
on the earth.(1)
3. Working as a doctor(1) calls for/involves/takes (1) a great sense of responsibility(1), for it means the difference/all the differences between life and death.(1)
4. In spite of repeated warnings(0.5) , students stil kept their mobile phones on(1) in class(0.5), so that even (1)the teachers turn a blind eye to it.(1)
5. You may not succeed (0.5) the first time (0.5) you make an attempt/try (1), but bear in mind that(1) only through hard work./by working hard(1) will you be/ become good at things/doing something.(1)
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