21.   Women and children were lined up in a half-circle facing an old, perfectly formed oak tree.

22.   An oak tree was planted in honour of the occasion.

23.   He was a huge man, built like an oak tree.

24.   The wind was bouncing the branches of the big oak trees.

25.   An oak tree cast its shadow over a tiny round pool.

26.   ...the topmost branches of a gigantic oak tree.

27.   There were two very large oak trees in front of our house with wide spreading branches and luxuriant foliage.

28.   We found a shady nook under an old oak tree.

29.   Picnickers drowsing in the shade of an oak tree.

30.   They squeezed through a narrow opening between the fence and an oak tree.