--- Do you know the Water Cube（水立方）at all?
--- No, this is the first time I _________ here.
A．wasB．have beenC．cameD．a(chǎn)m coming
B

試題分析：考查句型結(jié)構(gòu)It/This/that is/was +the first/second/...+that-clause,從句需使用完成時。這個句型結(jié)構(gòu)中，如果前面是is的話，從句用現(xiàn)在完成時，若前面是was的話，則用過去完成時。故本題應選B。句意：——你究竟知不知道水立方？——不知道，這是我第一次來這里。
點評：該句型結(jié)構(gòu)是�？純�(nèi)容，要記牢。尤其要注意，這個句型結(jié)構(gòu)中，如果前面是is的話，從句用現(xiàn)在完成時，若前面是was的話，則用過去完成時。
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