He is the only one of the students who _______ a winner of scholarship(奖学金) for three years.
His parents thought only in this way ________ become successful,studying abroad.
Hearing the bell ringing,out ________.
—When can I use your computer? —Never!________ should you touch it.
I really don’t know ________ I put my wallet after I paid the bill.
Behind the coach ________ our team wearing blue suits.