托福语法真题训练

以下是一些托福语法真题训练，供您参考：

The professor, along with his colleagues, _____ the research on environmental protection for many years.
A. has been conducting
B. have been conducting
C. had been conducting
D. were conducting
答案：A。因为主语是the professor，是单数，所以要用单数的动词形式，故选A。

_____ the Internet, you can find any information you want in a matter of seconds.
A. Through
B. With
C. By
D. In
答案：C。通过互联网，你可以在几秒钟内找到任何你想要的信息。这里表示“通过”用 by，故选C。

If we _____ to the concert, we would have heard our favorite songs.
A. went
B. had gone
C. have gone
D. would go
答案：B。这是虚拟语气的结构，表示“如果我们去了，我们就会听到我们喜欢的歌曲”，用过去完成时形式，故选B。

_____, he decided to quit his job and start his own business.
A. Having no job
B. Having had no job
C. Having been no job
D. Having no jobs
答案：A。这是现在分词作为原因状语的句子，表示“由于没有工作，他决定辞职并开始自己的生意”，故选A。

The teacher asked us to _____ the homework before class.
A. to finish
B. finishing
C. finish
D. finished
答案：C。这里是由 ask + 宾语 + 不定式构成的句子，表示“老师要求我们在课前完成作业”，因此选C。