问题

Looking for information on line today is very easy ; the _____________is how to tell whether the information you are getting is useful or not.

A:challenge
B:ability
C:knowledge
D:competition

正确答案是：

同类题型

side of the Bird’s Nest ,completed in 2008.

Excuse me. Could you ________ English in class— Yes, of course. I am very good at _______ English stories.

lan enjoy seeing his old friendsyesterday—Yes,he did.He___his old friends for a longtime.

Wherethe2010World EXPO ——In Shanghai.

my grandpa was young, he hadto________several miles a day to school since he had no money to take a bus