The answer is A because theres nothing else to modify.
1) when there is little water or no rain
2) environmental problems
3) were
4) B and C are correct?
5) reduce recycle reuse
6)
7) so do I
8) has been held, is held
9) Ted asked to let him know when he would be in the USA.
Is this an English test?
I think it’s A I don’t really know
