.
Most business letters and government reports are the main situations _________ formal language is used. ^*
| A．where | B．that | C．what | D．which |
Do you know how many people ______ up to now?
| A．have invited | B．have been invited | C．had invited | D．had been invited |
It is _____ my father worked _____ I work now.
| A．where, that | B．where, when | C．that, where | D．that, that |
Because the two countries were at _____ war, the people had ______ hard life.
| A．/; the | B．the; the | C．/; a | D．a; a |
—Have you graduated from college?
—Yes, ________.
| A．I studied French for two years. |
| B．I have been studying French. |
| C．I have studied French for two years. |
| D．I had studied French for two years. |
______ he can hardly read is ____________ he is slow in mind.
| A．what; that | B．That; what | C．What; because | D．That; because |