Use the infinitives in brackets in the necessary tense-form:

1. He always (to be) short of time. 2. A sundial (to tell) the time by shadows. 3. The name of each month (to have) rather clear origin. 4. My watch (to be) slow. 5. My mother (to have) no spare time. 6. We (to have) vacations in summer. 7. Peter usually (to set) his watch by the radio. 8. Sunday (to be) the first day of the week. 9. A great many of different clocks and watches (to help) us to measure the time.

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