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1.       A new cure for the disease is ______to be discovered.

A. like                       B. likely                 C. possible                           D. probable 

2. The hot line helps to keep the leader _____ what’s happening at each moment.

A. informing of       B. informed of      C. be informed to know       D. is informed

3. He looked tired. He seemed ______a sleepless night.

A. to have               B. he had             C. having                          D. to have had