Air cannot ______,but it is all around us.

admin2009-06-21  37

问题 Air cannot  ______,but it is all around us.

选项 A、is seen
B、see
C、be seen

答案C

解析 情态动词cannot后应跟动词原形,根据意义应用被动语态。
转载请注明原文地址:https://jikaoti.com/ti/veQsFFFM
0

最新回复(0)