We are often advised _________ notes in class, butfew do so.[ ]

33It was not until one night_____we were doing our cleaning-upIgot curious and wanted to see what was on the top floor

We’d be very grateful if you could join us because your cooperation will________the timely completion of our project.

once been withdrug dealings, but evidence found laterproved his innocence

下列各组句子中加横线词语的解释有误的一项是（ ）