Having a trip abroad is certainly good for the old couple, but it remains____ whether they will enjoy it.
| A．to see | B．to be seen | C．seeing | D．seen |
The reason Beethoven went away to the country is ______.
| A．that he was gradually going deaf |
| B．because he was gradually going deaf |
| C．on account of the fact that he was gradually going deaf |
| D．since he was gradually going deaf |
It is hard to imagine a large city without policemen, but such was the ______ in London in the early 18th century.
| A．condition | B．affair | C．environment | D．situation |
Prices reach equilibrium at the level at which quantity demanded ______ quantity supplied.
| A．is equal to | B．equal | C．equals to | D．is equal |
She possessed a quick mind, a sharp tongue and ______ a strong will.
| A．above all | B．first of all | C．most of all | D．moreover |
The composers soon began to write musical dramas about Bible stories ______ in church.
| A．to perform | B．performing | C．to be performed | D．be performed |