The burglar very stealthy if he was able to get past the watchmen without being noticed.

来源：百度知道 编辑：UC知道 时间：2024/05/23 18:23:55
A. must have been
B. could have been
C. should have been
D. would have been

C

这句话是与事实相反的虚拟语气，而不表示推测；事实上，贼根本没能够逃出去
所以用should have been “本应该”

A. must have been

A 贼 已 经 逃 走 了 。 事 后 检 讨 得 到 的 结 论
是竟 然 能 逃 过 守 卫 的 眼 ， 足 证 贼 的 偷
功 了 得 。