As you ______ new words in context, it is a very good method for you to guess their meanings.
October 1, 1949 was the day ________ the People’s Republic of China was founded.
I think you have got to the point ________ change is needed, or you would fail
This is the bag ________ my mother bought yesterday.
He made another wonderful discovery, _____ of great importance to science.
Luckily, we'd brought a mad map without _______ we would have lost our way.