—What does PM 2.5 mean?
—It's a professional ________ indicating the condition of air pollution.
| A．term | B．item |
| C．number | D．mark |
On the contrary, I think it is Truman, _____ you, _____ to blame.
| A．more than; are | B．less than; who are |
| C．rather than; that is | D．rather than; is |
The children talked so loudly at dinner table that I had to struggle ____.
| A．to be heard | B．to have heard | C．hearing | D．being heard |
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 |