Solution:
- A. The sentence 'roses A of all' is incomplete. Based on the options, 'many' (1) fits grammatically and contextually to describe roses.
- B. The sentence 'Then we sat on a bench and B some cookies and drank le' requires a verb. 'ate' (1) is the past tense of 'eat' and fits the context of consuming cookies.
- C. The sentence 'We saw many interesting birds in the trees, and there C' needs a verb indicating existence or state. 'was' (2) is the past tense of 'to be' and fits the singular subject 'there'.
- D. The sentence 'I like botanical gardens very much. Many D come to botan' needs a noun or noun phrase to complete the idea. 'children' (2) fits the context of people visiting gardens.
- E. The sentence 'I hope I E a scientist in the future and study different plant' requires a verb indicating a future state or aspiration. 'became' (1) is the past tense of 'become', implying a desired future transformation into a scientist.
Answer: A-1, B-1, C-2, D-2, E-1