145.
M: Excuse me. I have a ticket for the 6 o'clock flight to New York. But I'm afraid I can't make it. Is there a seat available for tomorrow morning?
W: Let me see. I'm sorry. All the morning flights have been booked. The earliest we can get for you is the two o'clock flight in the afternoon.
答案解析：
正确答案为A。根据I have a ticket for the 6 o'clock flight to New York. But I'm afraid I can't make it. 我订了6点飞纽约的航班，可是我去不了了。可知，男子不能按原定计划前往纽约，因此A项正确。

146.
W: I don't seem to be able to solve this problem. I'm following all the steps, but it doesn't work. I can't figure it out.
M: Let me show you. That one gave me a lot of trouble too.
答案解析：
正确答案为C。根据Let me show you.让我演示给你看。可知，男子将为女子演出解题步骤，因此C项正确。