—Would you like to come to dinner tonight？
—I’d like to, ___ I’m too busy.
| A．and. | B．so |
| C．as. | D．but |
He hurried to the station only ____ that the train had left.
| A．to have found | B．finding | C．found | D．to find |
Lily’s mobile phone was left in a taxi accidentally, never______________ again.
| A．to find | B．to be found | C．finding | D．being found |
A new teachnique ____the yields as a whole increased by about 30 percent.
| A．had applied | B．having applied | C．to have applied | D．having been applied |
No matter how frequently _____ ，the works of Shakespeare always attract large audiences．
| A．performing | B．to be performed | C．performed | D．being performed |
The place _______ the bridge is supposed to be built should be _______ the cross-river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which;in which |