People develop ________ preference for a particular style of learning at ________ early age and these preferences affect learning.
| A．a；an | B．a；不填 |
| C．不填；the | D．the；an |
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–Finished the novel? How do you find it?
–_______ It’s worth reading a second time.
| A．I didn’t get that. | B．It’s totally fascinating! |
| C．A friend lent it to me. | D．I bought it from the library. |
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–How did you know the surprising news?
–I happened ______ the event then.
| A．to be covering | B．to cover | C．covering | D．to have covered |
.
The house caught ______ fire while they were away. It must have been set ______ on fire by someone.
| A．a; a | B．a; / | C．/; a | D．/;/ |
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_______ the argument sounds reasonable, it still needs support of evidence.
| A．Since | B．Whether | C．Although | D．As |
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.Modern China is experiencing a completely new period ______ respect for science and creativity has become the guiding principle of the society.
| A．which | B．where | C．that | D．in which |