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题目内容
（阿坝师范学院大学英语）
Since we have a focused subject, we should not talk _______. [
A、 ] at once [
B、 ] at random
C、 ] at intervals [
D、 ] at hand [
A、 ] at once [
B、 ] at random
C、 ] at intervals [
D、 ] at hand [
参考答案
