Representatives from the two firms are currently_________

单选题Representatives from the two firms are currently__________the middle of negotiations concerning a possible joint venture.

A．in
B．on
C．at
D．within

参考答案A

解析:句子表示“协商正在进行”，因此构成短语in the middle of意为“正在做……”。

单选题 While you are aboard the ferry, please__________from smoking, eating, and drinking.

A．refrain
B．react
C．reverse
D．remark

单选题 Please__________ Ms.Merona to let her know that she can pick up her plane ticket to Toronto this afternoon.

A．conduct
B．confer
C．contact
D．concur

单选题 As long as demand__________,the product remains at this level, there is no way our company can lose money.

A．in
B．for
C．to
D．at