问题补充:
They think important to look right and left when the road.
A. it’s; cross
B. it; to cross
C. it’s;crossing
D. it was; to cross
答案:
A. it’s; cross
B. it; to cross
(答案→)C. it’s;crossing
D. it was; to cross
解析:考查从句知识。句意“他们认为在穿越马路时,往左右看看是重要的。”think后可跟宾语从句,还可以跟宾补结构。第一个空填it’s或it都可;when既可作连词,又可做介词;第二个空可以填they cross或crossing。故选C。