1:How long do you think_______he_________the computer?
1:How long do you think_______he_________the computer?
A:/ ;bought B:has;had C:did;buy D:/;has had
2:The two friends were______pleased to see each other that they forgot everything.
A:so B:too C:very D:much
3:The country life he was used to _________greatly since 1992.
A:change B:has changed C:changing D:have changed
请选择?为什么?