He often helps the students _______ he thinks are not quick at their studies.
She used ______ on the right in China, so she was not used _______ on the left in England at first.
____ finishing his homework, he went to play basketball.
He tried to invite some famous pop stars to sing in the concert ______, but failed.
_____ we have finished the course, we shall start doing more revision work.
I don’t like the way ________ Mr. Wang treats his children.