Complete the article below with the correct form of the verbs in brackets. Use the first conditional. In gaps 4 and 6, use a modal verb to make the prediction less certain

01 Đề bài:

6. Complete the article below with the correct form of the verbs in brackets. Use the first conditional. In gaps 4 and 6, use a modal verb to make the prediction less certain.

(Hoàn thành bài viết dưới đây với dạng đúng của động từ trong ngoặc. Sử dụng điều kiện đầu tiên. Ở khoảng trống 4 và 6, sử dụng động từ khuyết thiếu để làm cho dự đoán kém chắc chắn hơn)

Some animals, like lizards and worms, have an amazing ability to grow new body parts if they lose them. Salamanders can grow new legs and some worms can re-grow every part of their body, including their head! If scientists (1) _____________ (can) discover how this happens, in theory it (2) _____________ (be) possible to re-grow human body parts too. Very few scientists are working on this problem now, but if governments (3) _____________ (start) to spend more money on research, then this dream (4) _____________ (become) a reality. Amazingly, some worms have no limit on lifespan, as they continually re-grow their bodies as they age. So if we (5) _____________ (learn) to repair human limbs and organs, it (6) _____________ (be) possible to prevent us from dying. But that is a long way in the future.

02 Bài giải: