Đề kiểm tra giữa kì 2 Tiếng anh 12 năm 2023 có đáp án (Đề 5)

It can be inferred from the passage that research concerning the distress signals of trees

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It can be inferred from the passage that research concerning the distress signals of trees______.

has been unproductive up to now

is no longer sponsored by the government

was conducted many years ago

is continuing

Giải thích

Chọn D