Mr. David Melville suggests that in future more food could be imported into Hong Kong

* Hướng dẫn giải

Đáp án là A. insufficient: không đủ. Ý trong bài: Food supplies, for instance, could be affected by lower crop yields. “Maybe we could afford to import food from elsewhere but you have to keep in mind that the type of changes experienced in southern China will take place elsewhere as well