From the ________ look on his face, I knew that he must have been threatened by someone.
| A．vivid | B．horrible | C．curious | D．terrified |
We noticed that each animal and each tree in the park _____ being taken good care of.
| A．are | B．is | C．were | D．was |
Part of the reason Charles Dickens loved his own novel, David Copperfield, was _____ it was rather closely modeled on his own life.
| A．what | B．that | C．why | D．whether |
That is the only way we can imagine _____ the overuse of water in students’ bathrooms.
| A．reducing | B．to reduce | C．reduced | D．reduce |
Don’t phone me between 7:00 and 8:00 in the evening. We _____ dinner then.
| A．are having | B．had | C．would have | D．will be having |
Life in the 21st century is much better than_____ used to be.
| A．that | B．it | C．what | D．one |