107.　 107.　 ______ these questions may sound academic, answers to them could have profound economic and political significance.

a. Since　　 b. If　　 c. While 　　d. Lest

106.　 106.　 ______ to space travelers is high acceleration or deceleration forces.

a. Danger can be　　　　　　 b. They can be dangerous

　 c. What can be dangerous　　 d. While danger

105.　 105.　 The quantum theory states ______, such as light, is given off and absorbed in tiny definite units called quanta or protons.

a. energy that　　 b. that it is energy　　 c. it is energy　　 d. that energy

104.　 104.　 I have little doubt about his competence; ______ he is well-qualified for the job.

a. although　　 b. because　　 c. moreover　　 d. yet

103.　 103.　 Mrs. Lee will move into her new house next Monday, ______ it will be completely furnished.

a. by which time　　 b. by the time　　 c. by that time　　 d. by some time

102.　 102.　 Mr. Chen said that he would be punctual for the appointment, ______ he were late?

a. but what if　　 b. how about　　 c. so what　　 d. and what about

101.　 101.　 ______ steel is stronger than iron, men are able to make steel pipes with larger diameters.

a. While　　 b. If　　 c. Unless　　 d. As

100.　 100.　 The audience, ______ enjoyed the performance.

a. most of them were students　　 b. most of whom were students

c. whom they were students　　　 d. they were mostly students

99.　　 99.　　 Our confidence in the curative properties of the bottle of medicine remains the same ______.

a. like theirs　　 b. as they　　 c. as theirs　　 d. as them

98.　　 98.　　 In the testing period, the students spent ______ much time in the classroom on mathematics ______ they spent on any other subject.

a. as, as　　 b. as, that　　 c. so, that　　 d. such, that