When ___ this medicine, it is a good idea to avoid ______ alcohol.
| A．taking; drinking | B．taken; drinking | C．taking; to drink | D．taken; to drink |
The accident is reported to have occurred __________ the first Sunday in February.
| A．at | B．on | C．in | D．to |
People may have different opinion about Karen, but I admire her. ______, she is a great musician.
| A．After all | B．As a result | C．In other words | D．As usual |
There are altogether eleven books on the shelf, ______five are mine.
| A．on which | B．in which | C．of which | D．from which |
You can't wear a blue jacket _____ that shirt — it'll look terrible.
| A．on | B．above | C．up | D．over |
1 feel that one of my main duties ______ a teacher is to help the students to become better learners.
| A．for | B．by | C．as | D．with |