Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
We live day by day, but in the great things, the time of days and weeks ____ so small that a day is unimportant.
| A．is | B．are | C．has been | D．have been |
I don’t mind her criticizing me, but _____ is how she does it that I object to.
| A．it | B．that | C．this | D．which |
—Where is my dictionary? I remember I put it here yesterday.
—You ______ it in the wrong place.
| A．must put | B．should have put | C．might put | D．must have put |
Eugene's never willing to change any of his opinions. It’s no use _____ with him.
| A．to argue | B．arguing | C．argued | D．having argued |
____ you may be right , I can’t agree completely.
| A．While | B．As | C．If | D．Since |