_______ the house is empty, memories flood my mind of a time when it was filled with life.

  A. Since                   B. Unless                      C. As if                       D. Even though

The numbers that researchers get from the experiments can be _______, just like number puzzles.

  A. disappointing      B. inspiring                C. worrying                 D. confusing

Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.

A. while                  B. or                      C. for                       D. so 

The police say there is a $50,000 _______ for any information that helps them find the killer.

A. income                    B. fee                         C. bill                          D. reward

 We apologize for any inconvenience you _______ have been caused by the delay of the flight.

A. may                    B. would                C. must                     D. need

Parents should pay attention to areas _______ their child is having difficulty and spend extra time to help him or her master those skills.

A. as                B. where                 C. why                   D. when

— I suppose there’ll be a lot of arguments.

— _______

  A. As you like.                                         B. No problem. 

C. That’s a good idea.                                 D. I should imagine so.

All I’m hoping for is _______ wherever Michael is he will come home safe and sound.

A. whether               B. which                   C. that                      D. what

Jobs are hard to get and, _______, more young people are continuing their education.

A. above all                  B. as a result                 C. after all                    D. on the contrary

The story carries a strong message, _______ that will hopefully touch all who read it.

 A. any                        B. one                          C. it                             D. each