He has difficulty ___ the word

Do you know the difficulty he has ___ (understand) what trav he has no difficulty ---------（work）out the problem . He has some________ the maths problem.A.difficulty to work o Do you know the difficulty he has ___what eco-travel means? 这是什么句型 he had great difficulty in ___(control) the car He has some difficulty （eat）so much food He has difficulty in sleeping,inability to concentrate. the key,___ he lost ,has been found 36、 “___ times has he visited the Great Wall?”“Twice.” He has worked in the doctor's ___. he has succeed ___（pass）the driving test (Surprise)___ , he has passed the driving test