China is embarrassed by such a fact: Chinese visitors______ rubbish on the Great Wall, followed by a foreigner picking up the litter.
| A．will drop | B．would drop | C．are dropping | D．had dropped |
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China is embarrassed by such a fact: Chinese visitors______ rubbish on the Great Wall, followed by a foreigner picking up the litter.
| A．will drop | B．would drop | C．are dropping | D．had dropped |
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