following explains the answers to Test Yourself: Relative Clauses
Trick Question! Neither
the relative pronoun"that" nor "which" would
Sentence 3: This is not
The patient responded well to this treatment, which was a relief to us.
Remember to watch for "which" clauses
at the end of sentences that do not have a clear reference. Was
it the treatment that was a relief? It is more likely that the
response of the patient to the treatment was a relief.
Because a "which" clause cannot
modify an entire sentence but only a noun, it would be better
to revise this sentence. Here is one possible revision:
The patient responded well to this treatment; her response was a relief to us.
In the revised example, it is now clear what
exactly was a relief: it was not the treatment but the patient's
response to the treatment. Also see "Which
to Sample Paragraph