Neither Amy nor Jim and I （ ） his colleagues.
（A）are
（B）am
（C）is
（D）was
The whole group （ ） the boss attentively.
（A）are listening
（B）is listening
（C）are listening to
（D）is listening to
The windows of our classroom （ ） every day.
（A）is cleaned
（B）are cleaned
（C）are cleaning
（D）is cleaning
