My most devoted friend, Professor Yang, _______ often go hiking when he lived in the mountain that was covered with forest.
The army went ________the thick forest and at last came to a little river.
You have made several mistakes in your exercises but ________you have done well.
The water lever has risen ________10 cm and up to 100cm in the last days.
The touch they had both kept in ________many years broke.
Don’t call me up in the company tomorrow,for I am________.