because;
because of this;being that;
another important factor/reason of... ;
since; as;
for;
in that...;
owing to;
due to;
for the reason that...;
in view of;
the reason seems to be obvious;
there are about... ;
for this reason;
as a result of this;
therefore;
...and so...;
consequently;
as a result;
thus;
hence;
so;
so that...;
in consequence;
as a consequence;
accordingly;
inevitably;
under these conditions
thereupon.