The cost of organic food is higher than of conventional food because the organicprice tag reflects more closely the true cost of growing the food．
| A．it | B．one | C．this | D．that |
The new airport will be_______ from all directions.
| A．available | B．achievable | C．accessible | D．obtainable |
By the time Juan gets home, his aunt _____ for Puerto Rico.
| A．will leave | B．leaves | C．will have left | D．left |
Robert is said _______ abroad, but I don’t know what country he studied in.
| A．to have studied | B．to study | C．to be studying | D．to have been studying |
________leaves the room last ought to turn off the lights.
| A．Anyone | B．The person | C．Whoever | D．Who |
Great changes have take place in that school. It is no longer ______ it was twenty years ago, _______ it was so poorly equipped.
| A．what; when | B．that; which | C．what; which | D．which; that |