1. use "to" where necessary 1) thet were come to do an experiment 2) she could speak eanglish when she was little 3) he will be able drime a car soon 4)you need not translate the next 5)did you have get up early yesterday? 6)we should be more polite with our parents 7)were you allowed attend the performance? 8) you ought return books to the library on time 9) you mustn't be late for school 10) may i use your mobile telephone? #2 1) you (mustn't/needn't) ring the bell. i have a key 2)you (mustn't/needn't) drive fast; there is a speed limit here. 3) it (may/might) rain, you'd better take a coat 4)he said that it (may/might) rain 5)they (should,must,are) work hard to be well-prepared for exams 6) i didn't (must, have to, to be) come to school yesterday as it was a day off 7)you (must/should/may) not take it. it isn't allowed 8)you (must/should/ought to) attend swimming-pool. swimming develops our lungs and breath.