教学过程中最基本、最重要的教学关系是（ ）。

(单选题)—How long ______ your brother ______ this camera?—For two we (单选题)—I have two soccer balls, what about you?—Oh, I don’t have _ (单选题)—Excuse me, can I sit here?—______. The old man who sat here (单选题)—Could you tell me ______ Zhang Aiping’s hometown？—The day a (单选题)—Look! Who’s ______ girl under the tree？—Oh, she is my siste (单选题)This is the book ______ tells many English stories. (单选题)—Dear sister, does the TV show “Dad comes back” ______ our f (单选题)—Where is Marry flying？—She is flying to France soon. She wi (单选题)I really don’t know ______ this question. It is too hard. (单选题)—Could you tell me ______ it is from the nearest shop to you