Question

Choose the correct present continuous or perfect continuous form of the verb to complete the sentence:
The scientist _____ been exploring the territory since last December.

• A. has
• B. have
• C. had
• D. none of these

Answer 1

Answer: (A)

has

The given sentence requires an auxiliary verb. The words 'since last December' and 'been exploring', show us that the action is in present perfect continuous tense. 'The scientist' is a third person singular subject and hence we will use 'has' here. Hence the correct option is A. Option B is incorrect, as 'have' is used with a third person plural subject. Option C is incorrect, as 'had' is used for actions done in the past. Option D is incorrect, as option A is the answer.