He is believed____________ in at his office on his way home.
| A．dropping | B．to have dropped |
| C．having dropped | D．to be dropped |
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 |
. It was the fact _______his father was ill in hospital_________ worried him and kept him awake for a whole night .
| A．which ; that | B．which ; which | C．that ; which | D．that ; that |
. Th
e Town Hall_________in the 1800’s was the most distinguished building at that time .
A．to be completed |
B．having been completed |
| C．completed | D．being completed |