目前各国在征收关税时采用得最普遍的征税方法是()。
A.从价税
B.从量税
C.复合税
D.选择税
参考答案:A
Turning around,I saw a little boy standing behind the tree,________ at me curiously.[ ]
A.stared
B.to stare
C.staring
D.having stared