21.   There were no boats on the lake, no swimmers or fishermen.

22.   There were several boats on the river.

23.   The boat should be operational by this afternoon.

24.   The boat was leaking water.

25.   The boat was too tall to pass beneath the bridge.

26.   There are some boats on the river.

27.   Instructions had gone out from on high that the boat was not to be rocked, and Margaret Thatcher was as good as her word.

28.   There were boats on moorings, a rowing dinghy plashing quietly along.

29.   He usually stood on a little platform raised high enough to enable him to see over and past the cabins when the boat was moving.

30.   Their boat was now downwind and they had to tack.