After arriving there in the deep night, we found there was no food _______ as all the shops were closed.
If (如果) he isn’t at school. Please call me _______ 453-7868. [ ]
I want to know___________.
Who will teach _______ oral English next term? Can it be a new teacher?— Perhaps. But our head teacher hasn’t told us ________ .
______ has your friend studied English?—Since 2001.[ ]