I suppose they have known about it, _______?
A. am I
B. am not I
C. have they
D. havent they
既是青藏地区的主要农业区,附近又有丰富的水能和地热资源分布的是()
A. 湟水谷地
B. 雅鲁藏布江谷地
C. 横断山区
D. 宁夏平原
The lady treats the boy well as if he ______ her own son.
A. is
B. was
C. were
D. would be
A.sawB.watchedC.noticedD.examined
A. saw
B. watched
C. noticed
D. examined