Classificações biológicas

Como Passar um factor de do radical?
Ex: a²√9

Estudar é polir a pedra preciosa; cultivando o espírito, purificamo-lo.
– Confúcio

One of the best ways to avoid getting cholera is the use of …
A condoms.
B glasses.
C grass.
D soap

If I won a lot of money, I ------ for all my family’s studies.
A paid
B pay
C will pay
D would pay

He will get there in time if he …
A ran.
B runs.
C was running.
D will run.

We ------ having English exam now.
A are
B be
C is
D was