单选题 If you ______a touch-tone phone, you won't need an operator.

A、 (A) had
B、 (B) are having
C、 (C) have
D、 (D) will have

【正确答案】 C

【答案解析】Real conditions in the present tense may use present tense in the if-clause. Choice (A) is the past tense. Choice (B) is the present continuous. Choice (D) is the future.