单选题 If the bills ______in five days, the company will seek damages.

A、 (A) weren't paid
B、 (B) won't have paid
C、 (C) aren't paid
D、 (D) don't pay

【正确答案】 C

【答案解析】Present real conditions may use present tense passive in the if-clause. Choice (A) is past tense passive. Choice (B) is future perfect passive. Choice (D) is present tense but is an active form.