Ⅰ.用动词的正确形式填空
1．All these years they ________________ (contribute) articles to our magazine.
2．I ________ (drink) five cups of coffee this afternoon.
3．It's a long time since you ________ (come) to see me.
4．You know, I ________________ (look) for a job for three months, and this is my first formal interview.
5．My sister ________ (stay) in Beijing for three months last year.
6．The little boy is dirty all over because he ________________ (play) in the mud all the morning.
7．I ________ (wonder) if you were free this afternoon.
8．Here he is! We ________________ (wait) anxiously for him since last night.
9．Excuse me, Marcia, a reporter from Vanity Fair ________________ (phone) all day. Could you speak to her now?
10．We ________________ (build) the bridge for over two years and it will be half a year before it's completed.
11．—Isn't it hard to drive downtown to work?
—Yes，that's why I ________________ (go) to work by subway.
12．She ________________ (work) on this essay for 20 minutes but she has written only about a hundred words.
