There are several chemical factories waste water into the river.
A. pour B. pouring C. are poured
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England is famous for_________.
| A．the Staue of Liberty | B．The Leaning Tower of Pisa |
| C．Tower Bridge | D．the Little Mermaid |
I won’t go to the concert because I________ my ticket.
| A．lost | B．don’t lose | C．have lost | D．will lost |
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