To save class time, our teacher has ____ students do half of the exercises in class and complete____ for homework.
Thanks to the modern technology, we can get several times ________ information _______ people did in the past.
All the viewers were deeply touched by Jay Zhou’s performance ________ they attended his concert.
I preferred _______the long jump rather than ________ in the relay race in the school sports games.
--- Are you satisfied with what he has done? --- Not at all. It can’t be ________.
Last week the students did the experiment in order to_______ if iron rusts in dry air.