Improve our score -Urgent

My wife and I have taken iBT two weeks ago.and in the speaking section ,it seems, we have some problems.
My score is :Reading=20,Listening=25,Speaking=19,Writing=20, total:84
My wife score is :Reading=21,Listening=19,Speaking=20,Writing=22 total:82
We can improve our reading and listening by ourselves(we are working on it ) 
We need the score above 100.what should we do?our time is so limited(less than four week).please help us