(1)Whenever he is asked to make comments, he always            (迟疑不决) and it takes him a long time to speak.

(2)She is deaf, but refuses to let her           （残疾）prevent her from doing what she wants to do.

(3)The news is certainly true although it hasn’t been announced            (正式地)

(4)Please download the document             (附在……上) to the e-mail, which contains all the information you want to know.

(5) You can never imagine what trouble we had             (分析) the data we collected for our project.

(6) The London Underground has the d            of being the first underground in the world.

(7)During both World WarⅠandⅡ, pigeons were e            to carry messages to and from the front lines, saving the lives of many soldiers and even helping win some important victories.

(8) He said he came from America, but his strong Canadian a           gave him away.

(9)He v            to help children with autism and visits them every weekend.

(10)The world c           of seven continents and four oceans is regarded as a small village with the Internet connecting us together.