To understand the grammar of the sentence, you must break it ____into parts.
| A．down | B．up | C．off | D．out |
His hard work_______when he got the result .
| A．paid for | B．paid back | C．paid off | D．paid up |
_____the film so many times , I don’t need to see or hear it___what is happening now on the screen .
| A．Seeing ; knowing | B．Having seen ; to know |
| C．To have seen , to know | D．To see , to know |
The students are forbidden , unless their special passes ,___________after 11 p.m .
| A．stayed out | B．to stay out | C．staying out | D．stay out |
Today , we’ll discuss a number of cases______beginners of English fail to use the language properly .
| A．which | B．as | C．why | D．where |
People who can’t ___________ between colors are said to be colorblind .
| A．separate | B．differ | C．distinguish | D．divide |