| do some research on，in ruins，make achievements，be combined with，be positioned as，as to，leave behind，refer to |
（1）My life aim is to
make achievement
make achievement
in everything．
（2）Berlin was
in ruins
in ruins
after World War Ⅱ．
（3）He
did some research on
did some research on
cancer when he was in England．
（4）If improved education
is combined with
is combined with
other factors，results can be achieved．
（5）He is so forgetful that he always
leaves behind
leaves behind
one or two items in the restaurant．
（6）He's very uncertain
as to
as to
whether it's the right job for him．
（7）Whenever we meet with new words，we may
refer to
refer to
the dictionary．
（8）Tom is excited to
be positioned as
be positioned as
a leader during this activity．
