检查柴油机机油时，应该把车辆放在平坦的地方，在发动机（）进行。
A、熄火后立即
B、怠速时
C、高转速时
D、冷车启动之前或熄火30分钟后
参考答案：D
—Can I borrow your English book, please?
—Sure. Please _______ soon. [ ]
A. give back
B. give back it
C. give it back
Kate was very fond of speaking French, ______ indeed she spoke well.
A．that
B．which
C．and
D．/
