— _________ has Liu Xiang taken part in world’s competitions of 110-metre hurdles?
— I’ve no idea. Let’s find it out on the Internet.
| A．How often | B．How many times | C．How much time | D．How much |
— _________ has Liu Xiang taken part in world’s competitions of 110-metre hurdles?
— I’ve no idea. Let’s find it out on the Internet.
| A．How often | B．How many times | C．How much time | D．How much |
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