I think you’ve get to the point ______ a change is needed, otherwise you’ll fail.
.Professor White has received a letter ___ to give a lecture in Peking University.
.The ____ in these villages has to get its water from well-spring.
—Where is your Chinese teacher from? —I’m not sure, but his Chinese ____ Hebei.
The birds flew ___ the direction of the south.
Soon came the bad news _____ the ship sank when it sailed ____ the coast.