Rats are harmful. We must get rid（）them.

单项选择题It was not until he arrived at the railway station（）he realized he had forgotten his ticket.

A、before
B、since
C、when
D、that

单项选择题What does the woman ask the man to do（）

A、Buy a computer for her.
B、Go to the store with her.
C、Lend her some money.
D、Replace the disc for her.