Употребить глагол в правильной форме, present continuous или present simple. 1. "where's your sister? "- "she (have) a bath" 2. it (not/snow) at the moment. 3. she (not/understand) what you're talking about.

1. "Where's your sister?"- "She (is having) a bath"
2. It (is not snowing) at the moment.
3. She (does not understand) what you're talking about.