2016年12月英语四级作文中常用关系词：先后次序关系
at this time;
first;
second;
at last;
next;
previously;
simultaneously;
eventually;
last but not least;
to begin with;
to start with;
to end with;finally;
seeing...;
since then;
first of all;
afterwards;
following this;
preceding this.
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