6．— Is there any possible way to help them get rid of such a bad habit? — To tell the truth, it’s very hardBut we teachers________on this problem

Mr. Brown arranged for the taxi to come atsix she would not haveto wait long at the station.

I intend to buy this kind of pen because I the pen well

More than 400 mainland tourists ________ from the landslide site till Saturday, but 18 others were still missing, because of the heavy rains.

I don’t know _________.