摘要： The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane normally. A. will function B. functioned C. is functioning D. has functioned
网址：http://m.1010jiajiao.com/timu3_id_2593685[举报]
The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane______ normally.
| A．will function | B．functioned | C．is functioning | D．has functioned |
The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane______ normally.
|
A．will function |
B．functioned |
C．is functioning |
D．has functioned |
查看习题详情和答案>>
The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane______ normally.
- A.will function
- B.functioned
- C.is functioning
- D.has functioned