单选题

It was very considerate ____________ you to let us know you were going to be late.

单选题 The whole working system of the company was thrown ____________ confusion after the power blackout.

单选题 It mightbe to your advantage ____________a computer course of some kind.

单选题 Where he had escaped from puzzled me.

单选题 If you have never made a list of ____________ to make an important decision, you should start.

单选题 We should not take having an endless supply of clean water for ____________.

单选题 Exchange of business cards ____________ quite popular nowadays.

单选题 I often ____________ an idea and keep it for later reference.

单选题 I was totally ____________ for the challenge which I would face up in the following years.