(33-39)　　  The Internet has become a good place to meet people. However, we need to learn 　(33)　 to protect ourselves because it is not always safe 　(34)　 friends through the Net.　　  Chatting online 　(35)　 fun, but remember 　(36)　 out your home address or telephone number. Also, if you want to meet your Internet friend 　(37)　 person, always tell your parents first. It may be wise to have your parents 　(38)　 with you when you meet an Internet friend. Finally, always choose a(n) 　(39)　 place to meet.
【題組】33.( )
(A)　who　
(B)　which　
(C)　how　
(D)　what