比一比，再组词。
驶（ ）辙（ ）固（ ）该（ ）
驰（ ）撤（ ）回（ ）刻（ ）
驾驶 奔驰 南辕北辙 撤离 固定 回去 应该 时刻
— The former president of Iraq was caught at last.
— Really? Where ______ himself? [ ]
A. has he hidden
B. had he hidden
C. was he hidden
D. has he been hidden
电流互感器接线方案：一相式接线、（），两相电流差接线、三相Y形接线
