These wild flowers are so special that I would do ____I can to save them.

My mother opened the drawer to _________ the knives andspoons.

Though I am improving in my study, I still have a long way to go _____some of my classmates.

It is not enough only ______the rules of grammar if you want to learn English well.

received an offer from a German university, butI’m still hesitating ______ I should accept it