4 . Nowadays, the Internet can allow us to step into a world without f
5 . He hurt his leg yesterday. ______ why he can’t come to ______ party.
A.That’s; tonight | B.That’s; tonight’s | C.It’s; tonight | D.It’s; tonight’s |
6 . The houses there were modest but neat, with new lawns that seemed oddly green and out of place in the uniformly brown s
7 . The BRIC (金砖) countries are the biggest centers of economic growth and more than half of the planet’s population, whose role in international a
8 . Carbon dioxide makes up the vast m