试题详情
- 单项选择题Silk（）by Chinese for thousands of years now.
A、has been used
B、was used
C、is used
- A
关注下方微信公众号，在线模考后查看
热门试题
- We are glad that we
- Both the kids and th
- One cannot learn a f
- （） difficulties they
- Let me（）the case car
- Is it OK if I take t
- — Mike injured his l
- Some TV programs are
- In order to（）the dis
- The red flower goes
- Professor Smith prom
- She usually wears ca
- Oil is an important（
- These radio and TV n
- ----When shall we me
- When a fire（）at the
- She's unlucky, and s
- We had a（）journey.
- We should not look d
- On average, a succes