—I don't understand why you didn't go to the lecture yesterday afternoon.—I'm so sorry.But I________my homework.
When the woman came back home, she had no idea how it ____ that her husband met with trouble again.
His success ____ the fact ____ he had been working hard.
The secretary has _____to the related guests all the invitations to our company’s celebration.
It is fashionable to drive a car, but to drive a car is not nearly as difficult as it is imagined on condition that you ______ the specialized rules.
The doctor was ______ immediately the little boy fell off a ladder and hurt himself.