If he takes on this work, he will have no choice but ______ an even greater challenge.
| A．meets | B．meeting | C．meet | D．to meet |
John felt very embarrassed ________ he entered the government hall.
| A．for the moment | B．the first time |
| C．for the first time | D．at the moment |
We live too far from the city to get a strong TV ________.
| A．sign | B．symbol | C．mark | D．signal |
It was last Saturday ________ we visited the History Museum.
| A．which | B．and | C．where | D．that |
I suggested that the problem _____as soon as possible.
| A．referred to being solved | B．referred be solved |
| C．referred to be solved | D．referred should be solved |
When ________ to the market, these products were very popular.
| A．introducing | B．introduced |
| C．introduce | D．being introduced |