Select the grammatically correct form of the following sentence from the options below:
The teacher is give a lecture on Wednesday, but they are still preparing the materials.
1
The teacher is giving a lecture on Wednesday, but they is still preparing the materials.
2
The teacher is giving a lecture on Wednesday, but she is still preparing the materials.
3
The teachers are giving a lecturing on Wednesday, but they is still preparing the materials.
4
The teacher is to be giving a lecture on Wednesday, but they are still preparing the materials.