It . . . . . . heavily, so I will take an umbrella with me. A. was raining B. is raining C. has rained D. rained

The correct answer is B. is raining.

The sentence is about an ongoing event, so the present progressive tense is used. The other options are not appropriate because they are not used to describe ongoing events.

• A. was raining is the past progressive tense, which is used to describe events that were happening at a specific time in the past.
• C. has rained is the present perfect tense, which is used to describe events that have happened at some point in the past and have a result in the present.
• D. rained is the simple past tense, which is used to describe events that happened at a specific time in the past and are not ongoing.