----Have you heard any sound last night ?
----Yes . At about 2 o'clock in the morning,a gun short ____________.
A. rang up B. rang off C. rang back D. rang out
On her birthday, she received a nice present from her parents ________ a note was attached, saying "We love you so much."
A. that B. to which C. in which D. which
(2015•湖北) The team are working hard to ________ the problem so that they can find the best solution.
A. face B. prevent
C. raise D. analyze
______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A. Which B. What C. It D. As
The researchers who study jokes want to find out _______ people from different nations and cultures find funny.
A. why B. that C. what D. whether
Hearing the son paid little attention to the marriage and _________ he remained _________with his work, the mother was quite anxious if he could find a girlfriend.
A. /, occupied B. that, to be occupied
C. /, to be occupied D. that, occupied
