______ is known to us all , the old scientist,______ life was hard in the past, still works hard in his eighties.
| A．It; whom | B．As; whom | C．As; whose | D．What; whom |
44. _____ the _____ of modern industry, the pollution is becoming more and more serious.
| A．With; developing | B．Under; development |
| C．With; development | D．Under; developing |
43. Our national scenery Zhangjiajie is so charming that it is _____ description.
| A．out | B．beside | C．over | D．Beyond |
42. In China children, even in their twenties depended _____ their parents _____ food and clothing.
| A．upon; on | B．on; in | C．on; for | D．at; to |
41. During her study in Massachusetts Institute of Technology she has got the degree _____ PhD, and it is a degree ______ chemistry.
| A．of; at | B．in; at | C．of; in | D．in; of |
40. Let’s put our heads together and decide _____ a plan of action.
| A．on | B．about | C．for | D．At |