Jack wasn't saying anything，but the teacher smiled at him ________ he had done something very clever.(2011·湖南)
| A．as if | B．in case | C．while | D．thought |
It still puzzles today’s scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代)
| A．that; while | B．why; while | C．how; when | D．what; as |
-- Mum, I failed again in today’s examination.
--Oh, ________. The world is not _______.
| A．come up; at its end | B．Cheer up; in the end |
| C．Look up; at the end | D．Take it easy; at an end |
______what many people thought, the graduate came here not to ______ fame or money but the true value of life.
| A．On the contrary with; look for | B．Contrary to; seek |
| C．Opposite to; search | D．To the contrary of; hunt for |
Her genuine love for you may _______ what she has sacrificed (牺牲)to make you succeed.
| A．stand for | B．count for | C．account for | D．speak for |
Totally _____ accident, the businessman got hold of a ten-pound fake banknote that was believed to ______ two hundred years ago.
| A．by; have been issued | B．with; have come into use |
| C．in; have come out | D．at; have come into being |