Complete the sentences by putting the verb in brackets into the Past Perfect or Past Perfect Continuous Tense. Розкрийте дужки, підкладаючи дієслова у часову форму Past Perfect або Past Perfect Continuous

1. The students … (to write) the paper by dinnertime.
2. They … (to sail) down the river for many hours before they came to the village.
3. The rain … (to stop) by the time we reached home.
4. We could not go out because it … (to rain) hard since early morning.
5. It … (to snow) all day long.
6. Mother … (not to cook) supper by the time they came home.