Computer newspapers have many advantages, except ______.
A. they are cheaper than traditional newspapers
B. they are very convenient to use
C. you can get more information from them quickly
D. you can easily save information for future use
孙中山三民主义思想的核心是()。
A. 民族主义
B. 民生主义
C. 民权主
D. 平均地权
If he ______ ill and missed many classes, he would have made greater progress.
A. has not been
B. was not
C. had not been
D. had been
Not only ______ about the food, but he also refused to pay for it.
A. he complained
B. had he complained
C. did he complain
D. does he complain
微信支付 
支付宝支付