Professor Smith, can I meet you at 10 o’clock tomorrow morning?—Oh, I’m sorryI a lecture at Hunan Normal University

Hearing their grandpa was coming, theybegan to ________ the work to prepare for a nice dinner.

Our enemy bills have been increasing steadilythese costs，our telephone costs have doubled over the past six months

He always did well at school________having to do part－time jobs every now and then[ ]

I really don’t know _________ I had mymoney stolen.