Multiple choice

Directions: Choose the correct form of tense to fill the blank.

She ______ to solve this problem since last week.

  1. had been trying

  2. has been trying

  3. tried

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

'Since last week' indicates an action beginning in the past and continuing to now. Present perfect continuous 'has been trying' captures this ongoing effort. Past perfect 'had been trying' would require a reference point in the past.

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