Entering the room,I found Mary____ at the desk and____ a letter.
| A．seated;wrote | B．sitting;written |
| C．seating;writing | D．seated;writing |
相关试题
The boys,with this frightening person, lost their tongues.
| A．to face | B．having faced | C．faced | D．facing |
Qingdao liesthe west coast of the Pacific Ocean, where we can not find many islandsthe coast.
| A．on; off | B．to; along | C．on; along | D．in; off |
一个四棱锥和一个三棱锥恰好可以拼接成一个三棱柱.这个四棱锥的底面为正方形，且底面边长与各侧棱长相等，这个三棱锥的底面边长与各侧棱长也都相等．设四棱锥、三棱锥、三棱柱的高分别为
，
，
，则
（ ）
A． |
B． |
C． |
D． |
Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
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