Đọc đoạn văn sau và chọn phương án đúng (ứng vói A, B, C hoặc D) cho mỗi chỗ trống từ 21 đến 30.
Honey is a sweet liquid made by trees. It (21) ______ of water and sugars. Bees may travel as (22) ______ as seventy-five thousand kilometres and visit over two million flowers to produce just half a kilo of honey. The colour and flavour of honey depend (23) ______ the type of flower visited. In (24) ______ , there are more than three hundred (25) ______ of honey. The lighter-coloured ones are generally milder in flavour than darker honey.
In ancient (26) ______ , honey was the main sweet food, as sugar was very (27) ______ . Honey was of great (28) ______ to the ancient Egyptians, who used it as payment.
Today, honey is produced and eaten in (29) ______ part of the world. Research suggests that it prevents tiredness and improves athletic performance. However, honey is not just food - it (30) ______ be taken for sure throats and is used in many skin and hair-care products.
Trả lời câu hỏi dưới đây:
____ (21)