<font color="#006400">Mr. Johansen lost (A) <u>his</u> electronic key (B) <u>of</u> the laboratory and had to pay (C) <u>a lot</u> to make a new (D) <u>one</u>.</font><br/><br/>B is wrong according to the answer key. I guess "<font color="#006400">of</font>" must be replaced by "<font color="#006400">to</font>", but why? Please advise.<br/><br/>LCChang