1．No one call deny the fact that__________．
2．The idea is hardly supported by facts．
3．Unfortunately,none of the available data shows__________．
4．Recent studies indicate that__________．
5．There is sufficient evidence to show that．
6．According to statistics proved by__________．It Call be seen that__________．
2．The idea is hardly supported by facts．
3．Unfortunately,none of the available data shows__________．
4．Recent studies indicate that__________．
5．There is sufficient evidence to show that．
6．According to statistics proved by__________．It Call be seen that__________．