He bought me a book, _____ was very useful.
A: who
B: that
C: which
D: what
A: who
B: that
C: which
D: what
举一反三
- He bought me a book, _____ was very useful.
- The book ____ I bought yesterday is very interesting. A: what B: which C: who
- which I bought, what I bought, I bought, which, what, who This is the only book ______ challenges this common belief.
- The book ________ he bought yesterday is very interesting.A. / B. why C. when D. what
- The book ___ he bought yesterday is very interesting.