It was a great _____ for him to be pleasant to people he didn't like.
| A．attempt | B．trouble | C．power | D．effort |
It was ____ that she couldn’t finish it by herself.
| A．so difficult a work | B．such a difficult work |
| C．so difficult work | D．such difficult work |
Weare watching TV ______ we caught sight of a friend of ours .
| A．as soon as | B．while | C．when | D．once |
The price of diamond rings has risen sharply _______ the price of gold rings has gone down.
| A．when | B．as | C．while | D．otherwise |
It is a long time since I last saw you . This sentence means _______
| A．I had seen you for a long time | B．I have seen you for a long time |
| C．I haven’t seen you for a long time | D．I saw you again before long |
_______ reason you may give , you ought not to have left homework unfinished.
| A．What | B．No matter | C．However | D．Whatever |