Question

a)
Although manufacturers
will be a long time before they
electric cars as prototypes for a number of years now, it
common.
a) have been producing / become
b) are producing / became
c) produce / will become
d) produced / are becoming​

Answer 1

Answer:

b

in my opinion i m not sure

Answer 2

Answer:

Option C

Explanation:

Because this sentence depicts future time hence will go for C option.