23. _______ the plane have taken off on time? --- I’m afraid not. The fog was too thick then.
Whom is it up to __________ the matter?
The position __________ he wants to apply is very important for the development of the firm.
He told me he had been offered a very well-paid __________ abroad.
On the top of the mountain __________.
The WHO thinks highly of the measures all the departments in China __________ to prevent large-scale outbreak of the disease.