青少年期(12岁~20岁)的心理-社会危机是( )。
A. 亲密对孤独
B. 勤奋对自卑
C. 自主对羞怯与疑虑
D. 同一性对角色混乱
Our Chinese like eating moon cake ____ Mid-autumn Day.
A. in
B. at
C. on
D. during
I get up early ____ the morning, but ___ Sunday morning I get up very late.
A. on;in
B. in;on
C. in;in
D. on;on
The first class begins _______ 8o’clock ______ the morning.
A. at/on
B. at/in
C. on /in
D. on/on