- When will our guests arrive at the airport?
- __________ the evening of this Saturday.
A:At
B:Of
C:In
D:On
欧洲流经国家最多的河流是( )
观察下列算式:
①1×5+4=32,
②2×6+4=42,
③3×7+4=52,
④4×8+4=62,
…
请你观察规律解决下列问题。