Bộ 20 đề ôn thi vào Chuyên Anh năm 2023 có đáp án (Đề 9)

A paragraph following this passage would most probably discuss

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A paragraph following this passage would most probably discuss

how the nervous system alerts patients.

how the immune system reacts to allergens.

what other diseases can be relieved by vaccines.

What flowers are harmless to hay fever patients.

Giải thích

Chọn B