To our surprise the stranger _____ to be an old friend of my mother’s.
| A．turned out | B．turned up | C．set out | D．set up |
Our lab is on the third _____ of a six—______ building.
| A．floor; story | B．floors; stories | C．ground; flat | D．apartment; ground |
The flowers ____ sweet in the garden in spring.
| A．smell | B．to smell | C．smelling | D．smelt |
-----when has the country been open to international trade?
-----1978, I suppose.
| A．Since | B．In | C．From | D．After |
At the meeting they discussed three different____to the study of mathematics.
| A．approaches | B．means | C．methods | D．ways |
Math is_______ mathematics.
| A．short for | B．in short | C．short | D．shortage |