The population in that country ----------- (increase) slowly now
It's still --------------(不知道)why he left his rock band.
The population in that country ----------- (increase) slowly now
It's still --------------(不知道)why he left his rock band.
increases
unknown
is increasing
unknown
is increasing
unknown
因为第一句话里有个now 所有应该填is increasing 表示动作正在进行。第二个填unknow
is increasing
not known