---You don’t seem to be quite yourself today, do you? ---I’m suffering from a cold. Nothing serious, ____.

 Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.

The demand for _____ skilled workers is still increasing.

— Your shoes don’t match your dress exactly.— Well, Bill told me not to buy them, but I bought them____.

The plane got back to the airport and landed＿＿＿＿at last.