It’s good to be back in __________ (文明)after living in a tent in the remote area for two weeks.

New York is a big c_________ city..

使确信，使信服vt _____ 

冒险，冒险经历n.______ 

好奇的adj.______

To my great d__________, my son has passed all his exams.

The next day, US President Franklin Roosevelt d________ war against Japan.

The United Kingdom c__________ of Great Britain and Northern Ireland.

Government promises to _______（创造）more jobs for laid-off workers.

Humans ________(不同于) from other mammals in their ability to speak.