I don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.
| A．不填；the | B．a; the | C．a ; 不填 | D．不填; 不填 |
Thomas Edison considered genius to be _____ one per cent inspiration and ninety-nine percent perspiration.
| A．composed of | B．constituted in |
| C．consisted of | D．comprised in |
All foreign visitors are requested to _____ with the regulations in this area.
| A．agree | B．comply | C．consent | D．conform |
These continual _____ in temperature make it impossible to decide what to wear.
| A．alterations | B．vibrations | C．waves | D．fluctuations |
The generation _____ makes it difficult for parents to understand their children’s opinions.
| A．division | B．gap | C．separation | D．interval |
. They always kept on good _____ with their next-door neighbors for the children’s sake.
| A．friendship | B．relations | C．intentions | D．terms |