Answer:
4. Our old toaster always burns the toast on one side.
Explanation:
1. The pact was negotiated by a team of seasoned diplomats.
2. The garden was colonized by a dazzling variety of weeds.
3. Our teacher was quoted in a magazine last week.
Sentence 4 is written in simple present tense, and the focus of the sentence is on the toaster (the "active doer" of the sentence.)
In sentences 1, 2, and 3, the focus is on the "receiver" of the "active doer" (diplomats, weeds, and magazine, respectively).
