Помогите выполнить задание (с объяснением). Put the verbs in brackets into

Помогите выполнить задание (с разъясненьем).
Put the verbs in brackets into the Present Simple or the Present Continuous.

1.A:I .....(think) of buying a new camera.
B:Yes,i ....(think) that is a good idea.

2.A:What ....(you/look)at?
B:These photos.The plase .....(look) very familiar.

3.A:Why ...(you/taste) the food?
B:I want to make sure it .... (taste) delicious.

4.A:.......(you/have) lunch now?
B:No.I .....(have) a sandwich in my bag to eat later.

5.A:Why ....(you/smell) that flower?
B:To see how it ...(smell).