A. He’s surprised she chose that agency.
B. He wonders why she’s kept her job.
C. He doesn’t know when her classes started.
D. He doubts she makes much money now.

A．Japanese students study much harder than Columbian students.
B．Columbian students score higher than Japanese students in math.
C．Columbian students are more optimistic about their math skills.
D．Japanese students have better conditions for study.