A driver should __ the road when .A concentrate on; drive B. concentrate in; driving C. concentrate to; drove D. concentrate on; driving
Let’s _______ our personal feelings for now, and get to our business.
You can take ____ you like here.
It is said that his carelessness ____ the terrible accident.
Tom as well as his friends ____ to visit our school soon after they arrive in Changsha.
By the time you ____ in, I ____ two letters.