At the beginning of class, the noise of desks____________ could be heard outside the classroom. [ ] A.opened and closed B. to be opened and closed C. being opened and closed D.to open and close
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【单选题】In the( ),businesses offer services for which they charge a fee that is based on the number of size of transactions they process.Some of these services lend thenselves well to operating on the Web.
【简答题】Harvard University offer a classic academic course based on the model of __________ during its early years. [A] English universities [B] American universities [C] Puritan universities [D] its own