—What's this in English?
—It's a ________.[ ]
A. CD
B. orange
C. egg
答案：A
______ herself in looking after the newly-born twins, she had to sacrifice her career to stay with her kids.
A．Occupied
B．Being occupied
C．Having been occupied
D．Occupying
静脉留置针封管时消毒肝素帽或者正压接头，用2～10mL肝素盐水正压封管。（）
