Gun control is a subject ______Americans have argued for a long time.
| A．of which | B．with which | C．about which | D．into which |
The sunlight _____ hard-edged shadow on the ground is white and blinding.
| A．being thrown | B．throwing | C．to throw | D．to be thrown |
I still think I should show support in such a tense situation but feel maybe I ____ my opinion in a milder way.
| A．could voice | B．would voice |
| C．could have voiced | D．must have voiced |
The article raised doubts _____ the suspect was really guilty.
| A．that | B．if | C．whether | D．how |
We regret _____ you that your application has not been approved.
| A．to inform | B．informing |
| C．having informed | D．to be informing |
--I didn’t get time to ask you why you looked so upset at the party.
-- Oh, a lot of unexpected things _____.
| A．arose | B．rose | C．were raised | D．were lifted |