13. Hoping that the work progressed, and unless a landslide occurred, the Americans expected to remove 5,000,000 cubic yards each year.
14. The study of the earth has always been stimulated by two fundamental passions of humanity—a desire for wealth and because of their curiosity.
15. He insists on our taking the trip and to go without further delay.
16. In reviewing, it is well to go over each part of the course carefully, and you should make a note of every point which you do not understand, and let each ask those questions which he himself cannot answer.
17. Mr. Fitzmorris is a man of great technical skill and who has handled the situation capably.
18. It will cost her hundreds of dollars to make the trip East and spending the requisite length of time choosing her purchases at the different wholesale houses.
19. He had assumed control of the office, planned the advertising, and the finances were also directed by him.
20. We have decided to go on the excursion to the Capitol and at the same time visiting Uncle John.
Exercise 207
What prevents clearness in the following?