16. The computer program is a puzzle to me. The more I think of it, the more questions I think of _____.
| A．ask | B．asked | C．being asked | D．to ask |
________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.
| A．Which | B．What |
| C．As | D．That |
Jennifer is always absent from school, ________ I suppose is why she is blamed now and then.
| A．which | B．who |
| C．that | D．what |
The college student lost his life trying to save the drowning child, ________ he will always be remembered.
| A．in which | B．about which |
| C．by which | D．for which |
That man is the richest ________ pleasures are the cheapest.
| A．whose | B．where |
| C．when | D．which |
The Charles Dickens Museum in Doughty Street is the only one of his London homes to survive, ________ he wrote Oliver Twist.
| A．where | B．that |
| C．which | D．what |