____ in the iron cage of the zoo, the tiger got quite angry.
| A．To trap | B．Trapping | C．To be trapped | D．Trapped |
Come and visit me whenever _______.
| A．you are convenient | B．you will be convenient |
| C．it is convenient for you | D．it will be convenient for you |
---Will Tony come to the party tonight?
---I’m not sure. He _______stay at home preparing for the coming exam.
| A．must | B．might | C．can | D．need |
The house I grew up _______ has been pulled down and replaced by a hospital.
| A．in it | B．in | C．in that | D．in which |
______ the project in time, the staff have been working at weekends since last summer.
| A．Completing | B．Having completed | C．To have completed | D．To complete |
---Why do you keep looking back?
---I have a feeling that we _______.
| A．were followed | B．have been followed | C．are being followed | D．are following |