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1 I feel better if i do some exercises every day

2 If Dave is thirsty, he always drinks water

3 I get very tired at school if i go to bed late

4 My dad doesn't sleep well if he drinks coffee before bed

PS: Zero Conditional

If + Present Simple, + Present Simple

Present Simple

he she it            + Ve/es                                               -утвердительное

i you we they    +V infinitive                                      (v-verb)

he she it        + does/doesn't        + V infin           -при вопросительном\

i you we they  + do/don't              + V infin             и отрицательном(not)                

1. The operating manual is the ___most important document_ that helps to__ ensure the correct operation of the user which will ensure reliable and long-term operation of the equipment or device __.

2.The operating manual should consist of some certain___sections___, they are brief description and operating principles, terms of service, main purpose, retention rule, repair principles and time of repair frames, transportation conditions, the method of disposal___.

3.The presence of_ such documents___ ensures the correct operation of the user which will __ensure reliable and long-term operation of the equipment or device.

Объяснение: