The teacher advised me to spend as much time as I ________.
The teacher advised me to spend as much time as I ________.
A.could study
B.could studied
C.could to study
D.could studying
答案及解析: D
The teacher advised me to spend as much time as I ________.
A.could study
B.could studied
C.could to study
D.could studying
答案及解析: D