You don’t know how difficult the job is, you have done it yourself.
| A．unless | B．since | C．if | D．because |
----Can you write to me if you are free?
----No problem. But _______ is your e-mail address?
| A．where | B．which | C．what | D．how |
----Don't forget to come to our school assembly(集会)tomorrow morning.
----I won't. Ijust now.
| A．reminded | B．was reminded |
| C．reported | D．was reported |
The railway _______ Qinghai to Tibet is the longest plateau (高原) railway in the world.
| A．connected | B．connects |
| C．connecting | D．is connected |
If we don’t study hard, we will in our class.
| A．take the lead | B．fall behind |
| C．be the first | D．be successful |
----Would you like some coffee?
----Yes, and please get me some milk, too. I prefer coffee _______ milk.
| A．to | B．of | C．with | D．than |