7. In a certain computer language (such as $A P L$), when an algebraic expression contains no parentheses, the operations in the expression are specified to be performed from right to left. For example, in this language, $a \times b-c$ is equivalent to $a(b-c)$ in standard algebraic notation. Now, an expression is written in this language: $a \div b-c+d$. In standard algebraic notation, it should be
(A) $\frac{a}{b}-c+d$;
(B) $\frac{a}{b}-c-d$,
(C) $\frac{d+c-b}{a}$,
(D) $\frac{a}{b-c+d^{3}}$
(E) $\frac{a}{b-c-d}$.
7. When performing the operation from right to left, first add $c$ and $d$, getting $(c+d)$, then subtract this result from $b$, obtaining $b-c-d$. Finally, divide this expression by $a$, resulting in $\frac{a}{b-c-d}$.
(E) True.