They think       important to look right and left when        the road.
A．it’s; crossB．it; to cross
C．it’s;crossingD．it was; to cross
C
考查從句知識。句意“他們認(rèn)為在穿越馬路時，往左右看看是重要的�！眛hink后可跟賓語從句，還可以跟賓補(bǔ)結(jié)構(gòu)。第一個空填it’s或it都可；when既可作連詞，又可做介詞；第二個空可以填they cross或crossing。故選C。
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