16.It is no doubt that once ____ this city, you’ll find that there is so much surprise waiting for you to discover. visit B. visiting C. visited D. to visit
The old couple have been married for 40 years and never once _____ with each other.
Not far from the club, there was a garden, _____ owner seated in it, playing chess with a friend.
---Why didn’t you try your best to get on the bus? ---I tried to, but _____ I could, it started moving.
----I hope you enjoyed the film last night. ----How on earth do you know I went to a film? I ________you.
They paid fifty percent of _____ they were able to earn to the state.