He is the first person you can think of to rely on, for he is always willing to ________ whoever is in trouble.
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.