Fill the Gap. Test 35

Fill the Gap. Test 35

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They _____ at sea for a total of 30 days.
When did you _____ on tankers?
Fishing gear _____ fouled the propeller.
The safety manuals _____ last month.
The Master and the Chief Officer _____ together for nearly three years.
We _____ each other since marine college.
Safety standards _____ in the last twenty years.
They _____ unloading since 0600 hours.
We are ready _____ underway.
If you miss the flight, you _____ the ship.
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