Our research has focused on a drug which is so _____ as to be able to change brain chemistry.
–Will you ______me ____out this problem myself?---OK.
–When did the concert_____?---Oh, two days ago.
________arriving in Tibet , the soldiers at once joined them ____their work.At; with B. On; in C. For; with D. After; to
–Did Li Hua’s parents leave her any money?--- No. She has to support _______by selling newspapers.
– What’s the date today?---It’s _______.