we are not attacked by nuclear weapons, we promise that under no circumstances u
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_____we are not attacked by nuclear weapons, we promise that under no circumstances _____ use the
bomb first but we reserve the right to use it for counter-attack when necessary.
[ ]
A. As long as; we shallB. If; shall we
C. So long as ; shall we
D. Even if; we shall
试题答案
C