21. The problem _______ at tomorrow’s meeting is an important one.
A. being discussed B. discussed C. to be discussed D. to discuss
22. _______ the terrible weather, he insisted on going to look for his missing child.
A. Thanks to B. In front of C. Along with D. Regardless of
23. ------- Has Jack started out? He said he would join in the party.
-------- He _________. He is a man who always keeps his word.
A. must have left B. need have left
C. should have left D. could have left
