1.   However, be sure the gap is wide enough to allow the wood to expand and contract.

2.   In consequence, amphibian fossils become very scarce indeed in later geological periods and there are long gaps in their fossil history.

3.   Suddenly there was a gap, as if a favourite comfortable armchair had been removed from its cosy place by the fire.

4.   The gap in fortunes is not just a result of out-of-sync economic cycles.

5.   The main gap was in provision for elderly people with senile dementia and for the new long-stay population.

6.   There are huge gaps in my knowledge of history.