long time, he hesitated whether heshould tell us ____ what had happened

Don’t be angry _______ me for not havingwritten. I was really too busy.

How can you use my computer without my permission? —Oh, I ________to tell you. I hope you don’t mind.

Be sure _______ when you enter the cave. Otherwise, you’ll hit your head on the rocks.

More and more foreign countries have been ________ China as a rising power.