—You are very fond of eating barbecued mutton kebabs.—Yes. Personally，nothing can be________. Would you like one?

Many things that were once considered useful and _____, for example, tobacco, is now thought harmful.

The top of the hill is _________,but the trees grow part way up its slope.

__________lessons were not difficult.

I’m very ________ about expressing my opinions in public in case I may make mistakes.