By the end of the last month, I_________all the CDs Of Justin Bieber.
| A．collect | B．collected | C．have collected | D．had collected |
______ 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 |