Put the verbs in the correct tense present simple or present continuous tense

put the verbs in the correct tense present simple or present continuous tense .

1. he can't speat on the phone because he [have] .... a shower.
2. when ....... Susie usually ...... her homework .[do]
3. I ............. German. [not] understand]
4. .............. they ..............chocolate ice cream.hỏi chấm[like]