Question

There (be) more trees in this area in two years.

Answer 1

答案：There【will be】 more trees in this area in two years.

翻译；将来这个地区将会有更多的树.

翻译；从in two years【两年后】可以知道要问一般将来时态.

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Answer 2

There (will be) more trees in this area in two years.

in two years 两年后，用一般将来时， there be 句型的一般将来时结构： there will be

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Answer 3

There (will be) more trees in this area in two years.

Answer 4

will be,因为后面“in two years"表示将来。