Nelson Mandela is，__________ the greatest man of the 20th century，certainly among the most extraordinary leaders．
| A．if there | B．if any | C．if not | D．if so |
Choosing the right dictionary depends on ______ you want to use it for.
| A．what | B．why | C．how | D．whether |
It is ___________ that theQing Tombs are influenced by the Ming Tombs, especially architecture and the way they are placed among the surrounding mountains and valleys.
| A．apparent | B．fragile | C．clumsy | D．imperial |
—Where did you lose your bicycle?
—It was in the playground______I played basketball.
| A．that | B．where | C．which | D．when |
She was the first woman ______ to the board.
| A．to be appointed | B．having been appointed | C．appointing | D．to appoint |
—Was ______ Bill, ______ played basketball very well, ______ helped the blind man cross the road?
—Yes, of course. He is always ready to help others.
| A．it; that; who | B．this; who; that | C．which; that; that | D．it; who; that |