If it _______ for his invitation the other day, I should not be here now.
A：had not been
B：should not be
C：were not to be
D：should not have been
下列属于计划免疫的是( )
读课文《识字6》填一填。
____对丑，____对恨。____对虚假，____对热忱。____见真情，____献爱心
