Though ____ to see the strangers, the housewife gave them a big smile and said hello.
| A．surprising | B．to be surprised |
| C．surprised | D．having surprised |
English is a language shared by several different cultures, but each of ______ uses it somewhat differently.
| A．which | B．what | C．them | D．whom |
Have you ever had the case _______ you can’t recognize your friend’s voice on the phone?
| A．which | B．that | C．where | D．when |
He made another wonderful discovery,_____ of great importance to science.
| A．which I think is |
| B．which I think it is |
| C．which I think it |
| D．I think which is |
When the poor old lady tried to ______ the cup on the shelf to have a drink, she ______.
| A．reach for; fell down | B．reach; fell down |
| C．reach for; had fallen down | D．reach; was falling down |
Maria has written two novels, both of _____ have been made into television series.
| A．them | B．that | C．which | D．what |