1) ______ the theory of language underlying the communicative approach
2) ______ the theory of learning underlying the communicative approach
3) ______ one of the objectives of the communicative approach
4) ______ one of the techniques of the communicative approach
5) ______ one of the main features of the communicative approach
a) language best learned through use in social context
b) to develop the students communicative competence
c) role play
d) the introduction of authentic texts into the learning situation
e) functional linguistics

核心系统中，分行机构在未报头寸的情况下，港币发报截止时间为（）。

A.13：00；

B.13：30；

C.14：00；

D.14：30。