–Why are you so worried?
--There are so many problems .
| A．remaining to solve | B．remained solving |
| C．remaining to be solved | D．remained to be solved |
Later in this chapter cases will be introduced to readers __ consumer complaints have resulted in changes in the law.
| A．where | B．when |
| C．who | D．which |
Jack is late again. It is ___ of him to keep others waiting.
| A．normal | B．ordinary |
| C．common | D．typical |
– Do you think we should accept that offer?
-- Yes, we should, for we ___such bad luck up till now, and time __ out.
| A．have had; is running | B．had; is running |
| C．have; has been run | D．have had; has been run |
It was announced that only when the fire was under control ___ to return to their homes.
| A．the residents would be permitted |
| B．had the residents been permitted |
| C．would be residents be permitted |
| D．the residents had been permitted |
--- I am so sorry to have come late for the meeting.
--- It is not your fault. With __ rush-hour traffic and __ heavy rain, it is no wonder you were late.
| A．a; a | B．the; the | C．/; / | D．/; a |