They______the launch of their new company only a year ago.A、announceB、are annou

游客2025-06-15 16

问题 They______the launch of their new company only a year ago.

选项 A、announce
B、are announcing
C、have announced
D、announced

答案 D

解析 The simple past of the verb is necessary because of the particular past time reference a year ago. Choice(A)is the simple present. Choice(B)is the present continuous. Choice(C)is the present perfect.

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