—— What do you think of the concert? —— Oh, it was＿＿＿＿＿success. 

 Though ___________ to see us, the professor gave us a warm welcome.

Playing too many computer games is ______ to school chidren.

The biggest problem with Bob is that he never has got a/ an ___ goal in his life.

You’d better give up using that kind of medicine, because it may be______ to your stomach.