If anyone knows of recent research about this topic, I would greatly appreciate
_____.
| A．that | B．this | C． it | D．one |
—I rang you at about nine, but there was no reply.
—Oh, that was probably I was seeing the doctor.
| A．why | B．when | C．what | D．that |
She looks sad. Could you please tell me ____ that prevents her from being as happy as before?
| A．what it is | B．it is what | C．how it is | D．it is how |
I just can’t figure out the meaning of the word---so I’ll have to ___ the dictionary.
| A．look up | B．go over | C．check in | D．refer to |
Being determined is a kind of quality and that’s ________ it takes to do anything properly.
| A．how | B．which | C．where | D．what |
Before making your speech, you’d better ________ your thoughts and ideas.
| A．collect | B．gather | C．get | D．prepare |