(토플) The nucleus is composed of particles called nucleons, which when electrically charged are protons and (_____) are neutrons.
1) when electrically neutral
2) electrically neutral
3) electrical and neutral
4) when it is electrically neutral
(수능) When we got to the restaurant, there were no empty tables. We should (_____) a table beforehand.
1) reserve
2) be reserving
3) have to reserve
4) have reserved
(SAT) Designed to resist storms by virtue of their (_____) weight, the oil platforms towed into the North Sea were the heaviest objects ever moved by human technology.
1) inconsistent
2) purported
3) unstable
4) random
5) immense
