Although he knew little about the work done in the field, he succeeded ____other more experienced experimenters failed.
| A．which | B．that | C．what | D．where |
31. Lewis was much admired ______ his work on the advanced medical research.
| A．on | B．in | C．for | D．With |
30. The pilot, whether ______ or design, made the plane do a sharp turn.
| A．by accident | B．at times | C．suddenly | D．all at once |
29. If you ______ go, at least wait until the rain stops.
| A．can | B．must | C．should | D．Would |
28. The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．How |
27. He couldn’t ______ the fact that the money was found in his house.
| A．answer for | B．leave for | C．account for | D．care for |