It was in the lab ______ was taken charge of by Professor Harris _______ they did the experiment.
There are many inconveniences (不方便) that have to be ____ when you are camping.
The size of the audience, ____ we had expected, was well over one thousand.
Very few experts have ____ with complete new answers to the world s economic problems.
A table made of steel costs more than ____ made of wood.
I couldn't afford to rent a house like this,______buy it.