21. The Smiths don’t usually stay at hotels, but last summer they spent a few days at a very nice hotel by ________ sea.
A．/; the B．the; the C．/; a D．the; a
22. My brother would like to buy a good watch but was available from that shop.
A．nothing B．none C．no one D．neither
23.Jack is late again. It is ____of him to keep others waiting.
A. normal B. ordinary C. common D. typical
