21. Lightning is a ____ of electrical current from a cloud to the ground or from one cloud to another.A) rush B) rainbow C) rack D) ribbon22. New York ____ second in the production of apples， produc
26. Physics is ________ to the science which was called natural philosophy in history.A) alike B) equivalent C) likely D) uniform27. The new appointment of our president ________ from the very beginni
1. You will want two trees about ten feet apart， from ________ to suspend your tent.A) there B) them C) which D) where2. As I was just getting familiar with this job， I had ________ to ask my boss
6. In some countries， _____ is called “equality” does not really mean equal rights for all people.A) which B) what C) that D) one7. Liquids are like solids ________ they have a definite volume.A
11. The students was just about to ________ the questions， when suddenly he found the answer.A) arrive at B) submit to C) work out D) give up12. When there are small children around， it is necessa
16. This hotel ________ $ 60 for a single room with bath.A) claims B) demands C) prices D) charges17. Although he had looked through all the reference material on the subject， he still found it hard
21. She was so ________ in her job that she didn‘t hear anybody knocking at the door.A) attracted B) absorbed C) drawn D) concentrated22. At first， the speaker was referring to the problem of poll
26. We gave out a cheer when the red roof of the cottage came ________ view.A) from B) in C) before D) into27. They took ________ measures to prevent poisonous gases from escaping.A) fruitful B) benef
1. In the experiment we kept a watchful eye _____ the developments and recorded every detail.A) in B) at C) for D) on2. There’s little chance that mankind would ________ a nuclear war.A) retain B) e
6. He made such a ________ contribution to the university that they are naming one of the new buildings after him.A) genuine B) minimum C) modest D) generous7. In the advanced course students must tak