With the development of science, more new technology _______ to the fields of IT．

A．has introduced　 B．was introduced　 C．is introduced　　D．is being introduced

On Sundays there were a lot of children playing in the park, _______ parents sitting together joking．

       A．their                  B．whose               C．which              D．that

Though I’m familiar __________the poem, I’ll try to learn it____________ heart．

      A．to; to                 B．to; by                C．with; by            D．with; to

If you listen to me, you ________ have some candies, dear．

     A．must                 B．may                  C．shall               D．will

Reportedly, yesterday a group of American soldiers were walking along the road in Iraq when a bomb was _______, three of whom were killed．

     A．set off                B．set out               C．set up               D．set about

_________ seems no sense in complaining．We should take action now．

     A．That                 B．This               C．It                   D．There

England is one of the countries___________ people drive on the left．

      A．that                  B．what                 C．which              D．where

Once new difficulties _________ in your work, it’s always important to use your brains．

     A．raise                  B．arise               C．arouse               D．rise

When the peace talk failed．There was a fear that war may ____________ at anytime．

      A．break off            B．break up            C．break out           D．break down

Many scientists have believed that there may be a _________of life on the Mar．

       A．mark               B．signal                C．sigh                  D．sign