I __________ my guest off at the station tomorrow.
| A．am seeing | B．see | C．saw | D．have seen |
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 |
Last week, only two people came to look at the house, ____ planning to buy it.
| A．neither of them | B．none of them | C．none of whom | D．neither of whom |
Wherever he goes, he readily _______ to new circumstances.
| A．accompanies | B．accounts | C．accomplishes | D．accommodates |