те Надо вставить in, on, at
3. Did you hear the doorbell? There is somebody.the door.
4. She is doing her homework.her desk

3. at

4. on

Объяснение:

Надеюсь это правильно, если не так то пршу прощение.

3. Did you hear the doorbell? There is somebody on the door

4.She is doing her homework on her desk

ТУТ ВСЕ ПРАВИЛЬНО

i don't like november and march.

you mustn't open the door for a stranger. a stranger should trick you. you might answer the phone. you don't have to tell everybody that you are home alone . you must know your parents' phone number. it have to be wise to know your neighbours .