It just depends on the subject that you are doing. .com is not the most reliable.
.gov and .edu are more reliable because they are from a government organization and a college or university,
Hope this is the answer you are looking for.
China is the answer to this question
Answer:
The second blue text from the top in the pic
Explanation:
The last one sounds like a pretty great awnser to me
The main clause is "Chris's chief interest was tennis".
The subordinate clause is "Which he was just learning to play" and it is an adjective clause because it describes what the "tennis" was like. Tennis is an object and this subordinate clause further describes that it is the tennis that he was trying to learn.