______ time went by , Herbert could finish all the maths exercises in class.
A．With B．As C．while D．Since
Lots of the scientists in our country are working hard to ____the planet Mars .
A．cover B．search C．discover D． explore
Look at the notice . You are not allowed ____ the gymnasium without permission.
A．to enter B．enter C．entering D．for entering
How are you going to _______ such problems?
A．do with B．deal with
C．deal D．do up
She _______ you for your money, but not for love.
A．married with B．married to
C．got married D．married
Class One and Class Five have many good students ,______will be surely admitted by key universities.
A．most of which B．most of them C． most of whom D．of whom
