更多"They fired upon the enemy from behi"的相关试题:
[单项选择]Trees take harmful gas from the air, and ______ oxygen (氧气)into the air.
A. let out
B. set off
C. give up
[单项选择]Trees take harmful gas from the air, and ______ oxygen (氧气) into the air.
[单项选择]What happened to the leaves falling from the trees in the second study
A. They broke down and the main parts turned into oxygen.
B. They broke down and the carbon content had mainly turned into carbon dioxide.
C. They broke down and the carbon content was mainly absorbed in the soil.
D. They absorbed more carbon dioxide.
[单项选择]In this park, sparrows often fly down from trees to eat from visitors' hands. They are used to （）in this way.
A. be fed
B. feed
C. having fed
D. being fed
[单项选择]Softwood comes from cone-bearing trees, which is ______ conifers(针叶树).
A. planted
B. called
C. watered
D. laid
[单项选择]We found （shelter） from the rain under the trees.
A. defense
B. standing
C. protection
D. room
[单项选择]The enemy finally had to ______ their troops from the occupied area.
A. retreat
B. dismiss
C. return
D. withdraw
