How about going cycling round the lake___________Saturday?
Correct Answer: EASY
Knowledge: Prepositions of time
We have: on + weekday => on Saturday (on Saturday)
The remaining answers:
A. in + month/month/year/season/century
B. at + hour/time
C. for + interval
How about going cycling round the lake on Saturday?
=> Shall ride a bicycle around the lake on Saturday?
The answer to choose is: EASY