I. Complete each of the following sentences with the most likely answer.¡¡
1. If you had worked hard, I\'m sure you _____ the examination.
A. could have passed
B. might have passed
C. must have passed
D. would have passed
2. The U.S. Secretary of State, together with his assistants, _____ on route to the Middle East for negotiations on the Middle East question.
A. are
B. were
C. has
D. is