Mr. Wang, a(n)_______editor and writer, is going to attend the conference to be held in Beijing next week.
| A．chief | B．upper | C．main | D．major |
50. A doctor was___________when Mother fell ill.
| A．called in | B．called up | C．call upon | D．called at |
49. You must go there at once because the situation prompt action.
| A．calls for | B．calls back | C．calls at | D．calls on |
48. Please _____ tomorrow, my number is 8855463.
| A．call up me | B．call me up | C．call me out | D．call out me |
47. ____ in thought, he didn’t notice me when I came into his room.
| A．Burying | B．Buried | C．Put himself | D．To be set |
46. The house _____ in 1808 still remained there.
| A．was built | B．being set up | C．to be constructed | D．Built |