They left without leaving a message，_____was more than we had expected．
| A．what | B．which | C．that | D．when |
37. All animals, ______ their size, breathe once for every four heartbeats.
| A．however | B．whatever |
| C．no matter | D．in spite of |
36. ______ has helped to save the drowning girl is worth praising.
| A．Who | B．No matter who |
| C．Anyone | D．Whoever |
35. ______ the house prices have risen sharply, the number of buyers is as great as ever.
| A．Despite the fact that | B．In spite of what |
| C．Regardless of | D．Contrary to |
34. Is this the reason ______ at the meeting for his carelessness in his work?
| A．why he explained | B．he explained |
| C．what he explained | D．how he explained |
33. Great honors will be given to ______ have successfully rescued the victims of the earthquake.
| A．those who | B．whoever |
| C．who | D．Whom |