During _________ 3-day conference, global warming became _________ major concern of all the representatives.
A. the; a B. a; the C. the; \ D. a; \
Not until _______ home _______ her appointment with the doctor.
A. she arrived; did she remember B. did she arrive; that she remember
C. she arrived; when she remembered D. did she arrive; had she remembered
By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _________ appeared a rare rainbow soon.
A. of which B. on which C. from which D. above which
Do you know since when it is ________ you have been interested in poetry?
A. when B. until C. how D. that
What’s the __________ of having a public open space where you can’t eat, drink or even simply hang out for a while?
A. sense B. matter C. case D. opinion
It is worth considering what makes “convenience” foods so popular, and_______ better ones of your own.
A. introduces B. to introduce C. introducing D. introduced
