31. To our surprise, they decided to________their differences and try to face the coming global problems together.
These days he has made _____ in his studies by working hard.
When he awoke, he found himself ______ in the hospital and ______ by an old woman.
When and where he came here _______ yet.
Dandy left word with my secretary _____ he would call again in the afternoon.
It is obvious to the students ______they should get well prepared for their future.