71. [A] that

　　[B] this

　　[C] those

　　[D] these

　　72. [A] when

　　[B] how

　　[C] what

　　[D] where

　　73. [A] common

　　[B] ordinary外語學(xué)習(xí)網(wǎng)

　　[C] standard

　　[D] average

　　74.

　　[A] Still

　　[B] However

　　[C] Moreover

　　[D] Whereas

　　75. [A] before

　　[B] ago

　　[C] later

　　[D] lately