With an appropriate preposition:
(1)We left Xi'an ____ a very hot summer afternoon. (2)The number of the employees has grown from 1, 000 to 1, 200. This means it has risen ____ 20 percent.
on;by
With an appropriate preposition:
(1)We left Xi'an ____ a very hot summer afternoon. (2)The number of the employees has grown from 1, 000 to 1, 200. This means it has risen ____ 20 percent.
on;by