1. She dreams of becoming ____pianist, so she makes ____most of her time to play the piano.
A. a; the B. the; / C. a; / D. /; the
2. Look! The dictionary , _____is red , is a birthday gift given by Father.
A. which cover B. the cover of which
C. the whose cover D. that the cover
3. –Did you ask the guard what happened?
--Yes, he told me all ______ he knew.
A. about which B. which C. that D. what
