1.'ve enjoyed ________to talk with you.

1.'ve enjoyed ________to talk with you.
a.to be able b.being able c.to been able d.of being able
2.to be honest,this is the only thing that i really ______.
a.worried b.worry about c.worry d.worried about
3.---why were you so late for work today?
---______to the office was very slow this morning because of the traffic.
a.driving b.i drove c.being driven d.drive
4.---how long does it take your father _______to work every day?
---about half an hour.
a.drives b.driving c.to drive
5.i don't remember_____to her some time ago.
a.to write b.writing c.written d.writes
6.they tried to silence the _______audience but in vain.
a.exciting b.excited c.to excite d.excite