A: A) barrier
B: B) fence
C: C) prevention
D: D) jam
举一反三
- 18. Deserts and high mountains have always been a ________ to the movement of people from place to place. A: barrier B: fence C: prevention D: jam
- Deserts and high mountains have always been a ___to the movement of people from place to place.<br/>____ A: barrier B: fence C: prevention D: jam
- Deserts and high mountains have always been a ______ to the movement of people from place to place. A: A) barrier B: B) fence C: C) prevention D: D) jam
- Deserts and high mountains have always been a ________ to the movement of people from place to place.
- Directions： Choose the best answer from the four choices marked A, B, C and D.The mountains form a natural _________between the two countries. A: prevention B: obstruction C: barrier D: jam
内容
- 0
10. Great changes _______ in China since the People’s Republic of China _______ in 1949. A: have taken place; was founded B: has taken place; was founded C: have been taken place; founded D: took place; founded
- 1
What do we learn about deserts from this text A: Deserts can change into green and fertile areas. B: Certain areas have always been desert. C: Deserts were once the home of elephants and giraffes. D: Deserts have been growing since the beginning of the worl
- 2
Great changes in our country since twenty years ago. A: have taken place B: have been taken place C: took place D: have been happened
- 3
In the past 30 years, great changes ___(take place) in our country. A: took place B: take place C: have taken place D: were taking place.
- 4
Great changes ______ in China in the past twenty years. A: have taken place B: took place C: were taken place D: have been taken place