We should be having fewer babies in order to reduce the earth's population.

We should be having fewer babies in order to reduce the earth's population.
We should be having fewer babies____ ____the earth's population may ____ ___.
China has managed to produce nuclear weapons and satellites.
China has_____　_____producing nuclear weapons and satellites.
I completely agree to the ban on smoking.
I‘m ____complete ____ ____ the ban on smoking.