I prefer historical dramas because they are a （relax） way for me to learn history．
Scientists around the world are working to a medicine for AIDS（艾滋病）． （ cover）
A team of climbers from Peking University reached the top of the world's mountain，Qomolangma， on May 15， 2018． （high）
In America， 95% of pet owners think of their animals as family ． （member）
Our team lost the game because we played very ． （bad）
The little boy said， "I am old enough to take good care of ．"（my）