Put the verbs in brackets into the correct present tense.
My daughter never (write) to me so I never (know) what she (do).

Question

Put the verbs in brackets into the correct present tense. 
My daughter never (write) to me so I never (know) what she (do).

Accepted Answer

The question requires us to put the verbs in brackets into the correct present tense. Let's analyze each part of the sentence:

**1. "My daughter never (write) to me"**
*   The word "never" indicates a habitual action or a general truth.
*   The subject "My daughter" is third person singular.
*   Therefore, the simple present tense is required, and for third person singular, "write" becomes "writes".

**2. "so I never (know) what she (do)."**
*   Again, "never" indicates a habitual state or a general truth for the speaker.
*   The subject "I" is first person singular.
*   Therefore, the simple present tense is required, and for first person singular, "know" remains "know".

**3. "what she (do)."**
*   This part describes the activities or state of the daughter that the speaker is unaware of. The phrase "what she (do)" in this context implies the ongoing activities or the current situation of the daughter.
*   The present continuous tense ("is doing") is the most appropriate choice here to express an action that is happening at the present time or an ongoing situation that the speaker doesn't know about.

Now let's evaluate the given options:

**Option 3: My daughter never writes to me so I never know what she is doing.**
*   "writes": Correct. Simple present tense for third person singular, indicating a habitual action.
*   "know": Correct. Simple present tense for first person singular, indicating a habitual state.
*   "is doing": Correct. Present continuous tense, indicating an ongoing activity or situation that the speaker is unaware of.
This option correctly applies all the necessary present tenses according to the context.

**Why other options are incorrect:**

**Option 1: My daughter never write to me so I never knew what she does.**
*   "write": Incorrect. For "My daughter" (third person singular) in simple present, it should be "writes", not "write".
*   "knew": Incorrect. "Never" indicates a habitual lack of knowledge, requiring the simple present "know", not the simple past "knew".
*   "does": While grammatically possible for a general habit, "is doing" is more natural for the specific ongoing activities one is unaware of. However, the first two errors already make this option incorrect.

**Option 2: My daughter never wrote to me so I never knew what she do.**
*   "wrote": Incorrect. "Never" indicates a habitual action in the present, not a past action. It should be "writes".
*   "knew": Incorrect. As explained above, it should be "know".
*   "do": Incorrect. For "she" (third person singular) in simple present, it should be "does", or "is doing" for present continuous.

**Option 4: My daughter never writes to me so I never knew what she does.**
*   "writes": Correct.
*   "knew": Incorrect. As explained above, it should be "know" (simple present) because "never" indicates a habitual state.
*   "does": While grammatically correct for a general habit, the error in "knew" makes this option incorrect.

Therefore, Option 3 is the only option that correctly applies all the verbs in the appropriate present tenses.

The final answer is $\boxed{	ext{Option 3}}$