Being ______ highly skilled reader is ______ key to becoming successful in the Information Age．
| A．a; 不填 | B．不填; a |
| C．the; a | D．a; the |
Bacteria do not develop at low temperature, so that food can be _______ in cold storage.
| A．deserved | B．reserved | C．preserved | D．conserved |
These pictures _______ us of the happy days which we spent together on the campus.
| A．remained | B．reminded | C．informed | D．reformed |
They have always treated us with open hands and we must be generous ________.
| A．in return | B．in addition | C．in vain | D．in case |
—All the building materials have been washed away.
—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
| A．when | B．that | C．which | D．If |
—It is _______he often fails in exams_______ makes his parents worried about him.
—So, he has to work whole-heartedly.
| A．what, that | B．that, what | C．that, that | D．/, that |