Grammar

1- In 1979, the Chinese government ....................................... a policy of one child per family. Currently, the policy ....................................... to a certain extent.

a- was introduced / has been relaxing

b- was introduced / will be relaxing

c- introduced / has been relaxed

Is that C?

2- Before the Panama Canal .................................... , ships ................................... through the stormy seas around the southern tip of South America to get from the Atlantic to the Pacific Ocean.

a- was built / had to sail

b- built / had been sailed

Is that A?