问题
选择题
Students in the USA spend time their homework than we do.
A．little , to do
B．little, doing
C．less , doing
D．less , do
答案
答案：C
根据后文有than，可知本题使用比较级，所以第一空应该为比较级，而spend 后接doing sth，故选答案为C
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