He__________unwisely, but he was at least trying to do something helpful．
| A．may have acted | B．must have acted | C．should act | D．would act |
Her family _____ much larger than mine four years ago. Her family _____ dancing and singing when I came in last night.
| A．were; was | B．was; were | C．was; was | D．were; were |
A knife and a fork _____ on the table. A knife and fork _____ on the table.
| A．is; is | B．are; are | C．are; is | D．is; are |
Many a professor _____ looking forward to visiting Germany now. Many scientists _____ studied animals and plants in the last two years.
| A．is; have | B．is; has | C．are; have | D．is; are |
Either you or he _____ interested in playing chess. _____ you or he fond of music at present?
| A．are; Are | B．is; Are | C．are; Is | D．is; Is |
He is one of the boys who _____ here on time. He is the only one of the boys who _____ here on time.
| A．has come; have come | B．have come; has come |
| C．has come; has come | D．have come; have come |