单选题 The meeting ______going on since eight o'clock this morning.

A、 (A) has been
B、 (B) was
C、 (C) is
D、 (D) will be

【正确答案】 A

【答案解析】An action that starts in the past and continues to the present uses the present perfect tense. Choice (B) is the past tense. Choice (C) is the present. Choice (D) is the future.