Professional people expect you to call them when it is necessary to cancel an appointment.
Can we remove "them"? To me, the answer is yes because "them" is understood.
You're right. You can. But you'd keep: Call their office; call their secretaries.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
You're right. You can.
But you'd keep:
Call their office; call their secretaries.