Recycling is one way to protect the environment; reusing is _____.
A. another B. the other C. one another D. one
I would have gone to my cousin’s birthday party last night, but I ______ available.
A. was B. had not been C. was not D. would not be
______ is often the case in science, there is no simple answer
A. That B. As C. When D. Where
The airport ______ next year will help promote tourism in this area.
A. having been completed B. completed
C. being completed D. to be completed
______ you said at the meeting describes a bright future for the company.
A. When B. How C. What D. That
I got to the office earlier that day, ______ the 7:30 train from Paddington.
A. caught B. to have caught C. to catch D. having caught
