-- Is there ______ umbrella on the desk?-- Yes, there is. It’s blue umbrella.A. an; a B. an; / C. the; a
—Haven’t you been to Beijing before? —. I went there last summer.
He could hardly believe his eyes,he?
I don’t know . When he . I will phone you.
The government the homeless people nice houses.
Everyone should make a contribution the environment.