(1).South African wine is very _______(suit) for daily drinking because it has a good balance of price and quality.
(2).Without ________(diverse), there can be no world as we know. (3). The importance of being an Olympian _______ (various) from athlete to athlete. (4). It was at that moment _______ I realized something was wrong. (5).___________(test ) several times, this new type of machine will be put into production. (6). The scientist has made a great contribution _____ the development of space. (7). Quantities of water _______ (waste) every day. (8). –where did you meet him? –It was on the farm _______ we worked. (9).Do you know when this kind of robot came into ________（exist）?
(10). As Artificial Intelligence becomes increasingly sophisticated, there are growing concerns that robots could become _______ threat.