A. to be
B. to have been
C. be
D. being
A. she seems to be there at the conference
B. she seemed to be there at the conference
C. she seems to have been there at the conference
D. she seemed to being there at the conference
A. moving toward greater informality
B. the influence of American English
C. the influence of science and technology
D. the conflicts between or among nations
A. when
B. that
C.which
D. while