Question

Circle the correct form of the verb. (necesito ayuda!)
1. For security purposes the employees change/ are changing their passwords regularly.
2. At present we use/ are using plastic packaging.
3. Several technicians receive/ have received professional training this year.
4. Nuclear energy began/ has begun to be used in 1955.
5. The system hadn’t worked/ didn’t work because it was/ had been wrongly connected.

Answer 1

1. For security purposes the employees change/ are changing their passwords regularly.

2. At present we use/ are using plastic packaging.

3. Several technicians receive/ have received professional training this year.

4. Nuclear energy began/ has begun to be used in 1955.

5. The system hadn’t worked/ didn’t work because it was/ had been wrongly connected.

Explicación:

todo lo subrayado es la respuesta correcta.