1. By the time we get to Chicago this evening, we _____________(drive) more than four hundred miles. We are going to be exhausted.

今天晚上到達(dá)芝加哥之前，我們已經(jīng)連續(xù)開了400里，都要崩潰了。

2. When Sarah goes on vacation next month, she _____________(study) German for over two years. She should be able to communicate fairly well while she is in Austria.

當(dāng)莎拉下個月去度假的時候，她已經(jīng)學(xué)習(xí)了兩年德語了。她到澳大利亞的時候應(yīng)該感覺相當(dāng)好。

3. I have not traveled much yet; however, I _____________(visit) the Grand Canyon and San Francisco by the time I leave the United States.?

我沒怎么旅游過，但是，在我離開美國前，去過大峽谷和三藩市。

4. By the time you finish studying the verb tense tutorial, you _____________(master)?all twelve tenses including their passive forms.

等你修完了動詞時態(tài)訓(xùn)練這門課，你就掌握了所有的十二種時態(tài)。

5. Drive faster! If you don't hurry up, she _____________(have) the baby by the time we get to the hospital.

快點開！如果你不快點，她可能在我們到達(dá)醫(yī)院前就要生了。

6. I came to England six months ago. I started my economics course three months ago. When I return to Australia, I _____________(study) for nine months and I _____________(be) in England for exactly one year.

我六個月前到了英國。三個月前開始學(xué)習(xí)經(jīng)濟學(xué)。當(dāng)回到澳大利亞的時候，我學(xué)習(xí)了九個月，在英國呆了一年時間。

7. Margie just called and said she would be here at 8 o'clock. By the time she gets here, we _____________(wait) for her for two hours.

瑪姬剛打電話來說她八點到，等她到了，我們都等了她兩個小時了。

8. Frank just changed jobs again. If he keeps this up, he _____________(change) jobs at least four or five times by the end of the year.

法蘭克又換工作了。如果他一直這樣下去，他今年年底前就換過4、5次工作了。

9. Come over to my house around 9 o'clock. By then, I _____________(complete) my history essay and we can go see a movie.

9點的時候來我家吧。那個時候我就寫完了歷史論文，然后我們?nèi)タ措娪鞍伞?/div>

10. In June, my grandmother and grandfather _____________(be) married for fifty years.?

今年六月，我爺爺奶奶就結(jié)婚50周年了。