Read these sentences:
1. Look at those dark clouds. I’m sure it________ (rain) cats and dogs tonight.
2. Rebecca______ (study) English at university at this time tomorrow.
3. Scientists predict that more than a third of the world’ s p l ant and animal species_______________ (become) extinct by the year 2050.
4. Sea levels _________(rise) by at least 16 cm by the year 2100.
Now choose the alternative which presents the correct verb forms that complete the sentences above, respectively: