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1. It was not until midnight the camping site.
A. that they reached B. that they did not reach
C. did they reach D. did they not reach
2. It is predicated that existing reserves of fossil fuel by 2045.
A. have been run out B. are going to be run out
C. will have run out D. have run out
3. Only by increasing its exports drastically from the present trade imbalance.
A. the country can emerge B. the country might emerge
C. can the country emerge D. the country might emerged
4. The more acid you add to the solution， it becomes.
A. cloudier B. the cloudiest C. more cloudy D. the cloudier
5. The lecture said “It's time you the literature review.”
A. began B. should begin C. begin D. are beginning
6. way you do it， the answer is always the same.
A. However B. Whichever C. Whoever D. Why ever
7. producing methane， the process also produces carbon monoxide.
A. Apart B. As well C. Besides D. In addition
8. Einstein， changed our ways of seeing the universe， did not learn to read until he was ten.
A. which theories B. that his theories
C. whose theories D. who theories