19. I wondered_____that made him so upset.
| A． how it was | B． which did it | C． what it was | D． who did it |
You can’t imagine _______ when they received those nice Christmas presents.
| A．how they were excited | B．how excited they were |
| C．how excited were they | D．they were excited |
It is difficult for us to _________ a conversation with so much noise around us.
| A．communicate with | B．carry on | C．set up | D．bring up |
____ of the land in my hometown ____
covered with trees and grass.
| A．Two-fifths; is | B．Two-fifth; are | C．Two-fifth; is | D．Two-fifths; are |
I failed again in the examination and only then _____ how much time I had wasted.
| A．I realized | B．I had realized | C．did I realize | D．had I realized |
She knows so much about England. She ________ there before.
| A．must be | B．must have been | C．must live | D．must have lived in |