_______they visited the Science Museum, they showed great interest in everything they saw.
A. For the first time B. At first
C. At the first time D. The first time
To their disappointment, they found the lecture given by the professor difficult__________.
A. to be understood B. to understand
C. understanding D. understood
As soon as he heard the ________ news of his death, she _______ tears.
A. shocked; burst out B. shocking; burst into
C. shocked; burst into D. shocking; burst out
----I’m going to the United States.
---- How long ____you ____in the States ？
A. are; stayed B. are; staying
C. have; stayed D. did; stay
He often helps the students _________he thinks are not quick at their studies.
A. whom B. whose C. when D. who
This painting of his had been ____________ by some experts of the world.
A. high thought of B. well thought of
C. highly thought D. good thought
