The Nuclear Security Summit is an initiative of Mr. Obama, considers nuclear terrorism to be one of the greatest threats to international security．
A．which B．what C．who D．Whom
You type almost anything, however unclear, into the space provided on Google and in a second it __________ thousands of references．
A．catches up with B．comes up with
C．ends up with D．puts up with
–I was surprised to see wild flowers in Alaska．
--Many people think there is nothing ice and snow．
A．except for B．rather than
C．apart from D．regardless of
This film is boring; it is, in fact, rather exciting and fascinating．
A．all but B．nothing but
C．no more D．anything but
What wonderful world it would be if all countries in the world could live peace with one another．
A．a; \ B．the; \
C．a; the D．the; the
Our new machines are much cheaper to run．
A．effective B．efficient
C．energetic D．Enthusiastic
