37.The conference had been held to discuss the effects of tourism __ the wildlife in the area.A in B on C at D with为啥选C?打错了……是“为什么选A”？

Cleaning the Conference Room attend the conference in cover the conference是什么意思 at the conference attand the conference conference conference conference conference conference conceal the conference 什么意思 ...the conference 介词是什么atinon Easten Conference Player of the at the conference call ,in the conference call,on the conference call 以上哪个是正确的表达? The Asia-Pacific Consensus Conference 是什么 Conference of the Parties 17什么意思 请问“On the conference”、“At the conference”、“In the meeting”、“At the meeting”哪个正确? Not having received the invitation letter expected from the conference,Nick Leach asked the Program Chair to ______A.see to thatB.see to it C.see it D.see that顺便再问一个吧 The old couple ______ the train for New York yesterday afternoon.A.ha