cuse me, ______ I’m afraid you can’t sit here. This table is reserved.

I am sorry to have________much of your spare time.— That’s OK, and I am glad to help you.[ ]

Thank you. It’s kind of you to help mewith my English. —________.

It’s dangerous to walk across the street carelessly.–You’re right. We can’t be ________ careful while crossing the street.

The explorers failed to find the cave because it was not locatedthey had expected it to be.