34. Since 1776, a variety of treaties, purchases, wars, and Acts of Congress ___________ the territory of the United States to what we know today.
(A) has extended
(B) extended
(C) have extended
(D)had extended

答案：登入後查看
統計： A(34), B(10), C(85), D(57), E(0) #1450724

詳解 (共 2 筆)

#2969495
依提意是從過去到現在一直持續，故用hav...
(共 28 字，隱藏中）
前往觀看
11
0
#3970231
Since自從....
故為現在完成式
2
0