21.   ---It’s too hard£®I can’t figure it out, Mommy.

--- _______, Tommy£®You can make it!

A£®No problem      B£®No hurry           C£®Come on            D£®That’s OK

22£®By awarding the Nobel Peace Prize to Mr£®Obama,       Nobel Committee surely hoped to influence _____debate about U.S£®policy in Afghanistan.

A£®a; the                  B£®a; a                     C£®the; the               D£®the; a

23£®I can’t help      if my students are always making any noise in class.

A£®this                     B£®that.                    C£®them                   D£®it