At the crossing there is an arrow _______the direction to the Andrew farm.

He started to learn English in 1990 and in the years ________ he kept on using it in his work.

This company was the first _____ portable radios as well as cassette tape recorders in the world．

______up the recovery process, the government declared a public health emergency in the Gulf Coast areas hit by the hurricane.

--- Robert is indeed a wise man.---Oh, yes. How often I have regretted_______his advice!