---Why are you so late?
---I got stuck in the traffic jam, or I ___earlier.
| A．arrived | B．had arrived | C．would arrive | D．would have arrived |
--This decision really upsets me.
--- _______, Ellen. Things will work out well.
| A．Don't mention it | B．I don't think so. |
| C．No problem | D．Take it easy. |
These suggestions are perfectly in _____ tune with our thoughts on ______ subject.
| A．the; the | B．/ ; the | C．/ ; / | D．a; the |
When first____ to the market, these products enjoyed great success.
| A．being introduced | B．having introduced | C．introduced | D．introducing |
That art center is _______ used to be a factory, ______ millions of tractors were produced.
| A．where; where | B．what; where | C．what; which | D．where; which |
--- Have you finished the report?
--- No. I ______ it all this week.
| A．will do | B．had done | C．have been doing | D．have done |