— __________ when has the country been open to international trade?
— 1978, I suppose.
| A．Since | B．In |
| C．From | D．After |
In the meantime, the question facing business is whether such research isthe cost.
| A．worth | B．worth of | C．worthy | D．worthwhile |
What’s thetemperature in Beijing during April?
| A．average | B．common | C．ordinary | D．normal |
We arrived on the platform just as the train was.
| A．pulling up | B．pulling down | C．pulling out | D．pulling into |
He pretended to be Japanese, but his Chinese accent him.
| A．gave；away | B．gave；up | C．gave；out | D．gave；off |
Our text book12 modules, one main revision.
| A．includes；containing | B．contains；containing |
| C．includes；including | D．contains；including |