My physics teacher told us light ______ faster than sound.
A. travel         B. travels              C. traveled
B
考察時態(tài)。句意：我的物理老師告訴我們光比聲音傳播快。結(jié)合語境可知從句中描述的是客觀性動作，故用一般現(xiàn)在時態(tài)，選B。
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