---I heard Back Street Boys will sing at the New Theater. ---Where did you ________?
Although there were so many people in the square, I could ______ my friend.
What worried the child most was ______ to visit his brother n hospital.
What the doctors really doubt is ______ my mother will recover from the serious disease soon. A.when B how C whether D why
He hasn’t slept at all for three days._______ he is tired out .
______ the window, my finger was cut unexpectedly.