——She looks rather upset. She          have failed the exam.

——I guess so. It's very difficult after all.

A. could               B. should                C. must                 D. might

You should read such books      you can understand without much difficulty.

A. which               B. that                C. as                            D. those

Do you believe his reason for being absent from class          he had to meet his uncle at the airport?

A. why                B. that              C. where            D. because

The slogan, "One World, One Dream",          the Olympic spirit of using sports to promote peace and understanding.

A. experiences          B. expresses                 C. declares                  D. performs

Sometimes failure          determination.

A. results from lack of                        B. results in lack of

C. results from lack in                                            D. results in lack in

Mary speaks better English than the others, but she has a (n)          because her mother is        English.

A. condition             B. personality          C. similarity             D. advantage

David is organized, easy-going, and intelligent         , I can't speak too highly of him.

A. In other words       B. On the other hand          C. In a word            D. As a result

Do clothes iron          when they are damp?

A. easily                B. very easy              C. more easily          D. easier

——How did you get in touch with Mrs. Green?

——Well, it seems that you've forgotten          me her telephone number the other day.     A. to tell                B. telling                  C. to have told         D. being told

——Need the patient be operated on immediately?

——Unless         .

A. being necessary                                   B. necessary

C. she is necessary                                 D. there is necessary