Why couldn ’t you ________ an answer when I asked you why you were late?

Which of the following country is not a member of OECD?

He shook hands with the visitors ________ as to convey his apology.

The policeman came up to the lonely house with the door _______, _______ there for a while and then entered it.

______ inns and taverns,in particular,gained a reputation for cleanliness and comfort and set the standard for accommodation in other parts of Europe.