We are all concerned _______ her safety.
A、aboutA
beconcernedabout：关心，担心。句意：我们大家都担心着她的安全。
To trade ____ the people of all eoun tries ____ the basis of equality and mutual ben efit is our established policy.
Which of the following is not an international visitor?
___________ is such a spitfire.
We ______ the seminar sponsored by you in September last year.
________ he has many friends, he is often feeling lonely.
