Fill in the blank with the most appropriate word. He ________ an aspirin half an hour ago. A. takes B. is taking C. took D. taken

The correct answer is C. took.

The sentence is in the past tense, so the verb must also be in the past tense. The other options are not in the past tense.

A. takes is in the present tense.
B. is taking is in the present progressive tense.
D. taken is the past participle of the verb take.

The past tense of take is took.

He took an aspirin half an hour ago.