Though many extra planes and trains are used to carry passengers, traffic tools are still needed during “May Day” holidays.[
The children all turned ____ the famous actress as she entered the classroom.
Edward, you play so well. But I ______ you played the piano.
She brought with her three friends, none of ______ I had ever met before.
I tried phoning her office, but I couldn’t _______.
His sister left home in 1998, andsince.
had not been heard of
has not been heard of
had not heard of
has not heard of