单项选择题
There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.
A.shown B.expressed C.appeared D.displayed
单项选择题 There is plenty of（）at this area.
单项选择题 There is not（）depth of water around the area centered at the lighthouse.
单项选择题 The vessel was drifted off from her（）due to strong wind.
