中文字幕在线中文乱码怎么解决,亚洲av片毛片成人观看,亚洲av无码专区国产不卡顿,亚洲精品国产综合久久久久紧 ,综合久久国产九一剧情麻豆

Every year millions of trees ▲ to prevent floods, droughts and sandstorms.A. plant B. are planted C. are planting D. were planted 【查看更多】

 

題目列表(包括答案和解析)

Every year millions of trees _____ to prevent floods, droughts and sandstorms.

[     ]

A. plant
B. are planted
C. are planting
D. were planted

查看答案和解析>>

Every year millions of trees ________ to prevent floods, droughts and sandstorms．

[　　]

A．plant

B．are planted

C．are planting

D．were planted

查看答案和解析>>


同步練習(xí)冊(cè)答案