I can’t put up with the （）lecture any longer，so I left my seat and began to think about the coming v

I can’t put up with the （）lecture any longer，so I left my seat and began to think about the coming vacation.A.boring B.worried C.bored D.restless

The correct answer is A. boring. Here's the analysis:

The sentence describes a lecture that caused the speaker to leave early, so we need an adjective describing the lecture itself. "Boring" (令人厌烦的) directly modifies "lecture" and logically explains why the speaker couldn’t tolerate it.

B. worried (担心的) describes a person’s emotion, not a lecture.

C. bored (感到厌烦的) describes how the speaker feels, but the structure requires an adjective describing the lecture ("the boring lecture" vs. "I feel bored by the lecture").

D. restless (坐立不安的) also describes the speaker’s state, not the lecture’s quality.

The completed sentence reads naturally: "I can’t put up with the boring lecture any longer, so I left my seat and began to think about the coming vacation." This choice maintains grammatical logic and conveys the intended meaning clearly.