21. I don’t know who invented _______ telephone, it’s really _______ most useful invention.
A. the; a B. the; the C. a; a D. 不填；不填
22. She heard a scream, _______ brought her heart into his mouth.
A. it B. this C. that D. which
23. It seems difficult to _______ “hurt” from “injure” in meaning.
A. judge B. tell C. divide D. separate
24. I have never dreamed of _______ such a good hotel in this town.
A. there was B. there is C. there being D. there have
