Althoughmy opinion,the old professor didn't come up with his own.
| A． | against | B． | on | C． | for | D． | in |
29. The nutrients in _____falls into the ocean will quickly become available to other living creatures.
| A．whichever | B．that | C．whatever | D．Wherever |
28. I don’t think you’ve quite___the seriousness of the situation. You seem to know nothing about it.
| A．recognized | B．mastered | C．grasped | D．Seized |
27. Mr. Bush is on time for everything. How ________ it be that he was late for the opening ceremony?
| A．can | B．should | C．may | D．Must |
26. The fantastic passenger ship sank with 2,500 passengers on board on her first _____.
| A．trip | B．travel | C．journey | D．Voyage |
25. The old picture will keep me ____________ of the old days I spent together with her in that village.
| A．remembered | B．remembering | C．reminding | D．Reminded |