单选题 I am sorry for ______ you of their arrival.

单选题 The three men tried many times to sneak across the border into the neighboring country, ______ by the police each time.

单选题 ______, he can now only watch it on TV at home.

单选题 AIDS is said ______ the number-one killer of both men and women over the past few years in that region.

单选题 Professor Johnson is said ______ some significant advance in his research in the past year.

单选题 ______ him tomorrow?

单选题 ______ at in this way, the present economic situation doesn't seem so gloomy.

单选题 Even as a girl, ______ to be her life, and theater audiences were to be her best teachers.

单选题 ______ enough time and money, the researchers would have been able to discover more in this field.