---Will you join us to play basketball on Saturday afternoon?
---________, but I promised to go swimming with Eric.
| A．Never mind | B．Many thanks |
| C．Take it easy | D．With pleasure |
It’s said that he started his own firm when he was only 24.
| A． built | B．established | C．invented | D．created. |
The strategies that Tom came up with worked out fine.
| A．think up | B．thought up | C．thought out | D．came out |
I wish I could go to Mars one day.
| A．a few days. | B．that day. | C．in one day. | D．some day. |
My father was reading newspapers ____ my mother was cooking at this time yesterday evening.
| A．when | B．which | C．while | D．because |
--- How soon will the boss come back?
---__________ about three days.
| A．For | B．After | C．In | D．During |