—Thank you very much for helping me out of trouble, Bob.—________.
As we all know, Jack is experienced _____ the problem of this kind.
I could have helped him out, to tell the truth, I _____ too busy.
Badminton is a _____ by an Englishman.
– How much do you _____ mending a pair of shoes? -- $ 15.
The swimming pool is 80 meters _____ and 40 meters _______.