Parts of the cave have been badly affected by rain and to the air.
A. express B. excavate C. exposure D. expand
By the time Jack returned home from England, his son from college.
A. graduated B. has graduated C. had been D. had graduated
The Naxi believe that they came from a creature called Tabu, help them hatch from magic eggs.
A. who B. whom C. that D. which
Hardly Mike picked up the ball when another player took it form him.
A. have B. has C. had D. have been
The teacher propose that Jack ___ maths or physics instead of English because he was quick at numbers.
A. must study B. could study C. studied D. study
This is a very serious matter and the Chinese Academy of Sciences is trying to public awareness about it.
A. lift B. rise C. raise D. arise
