since
till
during
for
Answer is Right!
Answer is Wrong!
The correct answer is D. for.
The word “for” is used to indicate a period of time. In this case, the police have been looking for the person for four weeks.
The word “since” is used to indicate a point in time from which something has been happening. In this case, the police have been looking for the person since he disappeared.
The word “till” is used to indicate a
point in time up to which something happens. In this case, the police will continue to look for the person until they find him.The word “during” is used to indicate a period of time in which something happens. In this case, the police have been looking for the person during the past four weeks.