Question

Ubahlah kalimat pasiv menjadi kalimat aktif

1.Only for the last few hundred years serious attempts have been made to understand them
2. Many methods have been developed to predict earthquakes despite all the research efforts by seismologist

Answer 1

1. They have made only for the last few hundred years serious attemps to understand
2. The seismologist have developed many methods to predict earthquarkes despite all the research