1. Let set $A=\{2,0,1,3\}$,
$$
B=\left\{x \mid -x \in A, 2-x^{2} \notin A\right\} \text {. }
$$

Then the sum of all elements in set $B$ is ( ).
(A) -4
(B) -5
(C) -6
(D) -7
一,1. B.
It is easy to know that $B=\{-2,-3\}$.
Then, the sum of all elements in set $B$ is -5.