—What did the teacher say just now?
—He asked me _________.( )
A.how could I work it out
B.when did I go to the library
C.why I looked unhappy then
D.who I am waiting for
—I don’t know when ______ tomorrow.—I will call you as soon as he ______.
——Excuse me. Is it my turn now? ——Not yet. Please wait on the chair ______your name is called.
I was surfing the Internet my brother was doing his homework.
She has studied in this school she was seven years old.
While Helen _____ along the river after supper, she ____ a wallet lying on the roadside. A. was walking; was finding B. walked; found B. walked; was finding D. was walking; found