How many of the following sentences use the phrasal verbs correctly?
I. The researchers carried out the experiment as planned. II. The journal turned down the paper due to methodological flaws. III. The student came across a rare primary source in the archives. IV. The professor called off the lecture owing to illness.Step-by-step Solution:
Let's evaluate the usage of the phrasal verbs in each sentence: I. 'carried out' means to perform or conduct a task. This fits perfectly in the context of conducting an experiment. II. 'turned down' means to reject something. This makes sense in the context of a journal rejecting a paper. III. 'came across' means to find something by chance. This is correct for a student finding a rare source. IV. 'called off' means to cancel an event. This correctly describes a professor cancelling a lecture due to illness. All four sentences use the phrasal verbs correctly.