By far, there are many problems ________ to be solved.
6.What ______ great progress you have achieved in such ____ short time!
5.The little kid can help himself _____ his favorite toys.
4.My hands are dirty. I ______ the wall the whole morning but haven’t finished yet.
3.He always tells me ______ news he has got.
2.—It is really nice of you to come and meet me at the airport. —________.