A.The problem may have been a very complicated one.B.No one can solve this problem.C.The man thinks that the problem is quite easy for Linda.D.The man thinks that he can solve the problem himself.
A.The problem may have been a very complicated one.
B.No one can solve this problem.
C.The man thinks that the problem is quite easy for Linda.
D.The man thinks that he can solve the problem himself.