10. I am sure ________ he said is true.

　　A. that

　　B. about that

　　C. of that

　　D. that what

　　11. When and why he came here ________ yet.

　　A. is not known

　　B. are not known

　　C. has not known

　　D. have not bee

　　12.I wonder how much ________.

　　A. does the watch cost

　　B. did the watch cost

　　C. the watch cost

　　D. the watch costs

　　13. Mary is ________ someone might recognize her.

　　A. afraid of

　　B. afraid about

　　C. afraid that

　　D. afraid for

　　14.________ is no reason for dismissing her.

　　A. Because she was a few minutes late

　　B. Owing to a few minutes late

　　C. The fact that she was a few minutes late

　　D. Being a few minutes late

　　15. They came to the conclusion ________ by a computer.

　　A. that not all things can be done

　　B. because of not all things be done

　　C. being not all things can be done

　　D. because not all things can be done

　　Answers:

　　1-5. CDCDB

　　6-10. BABCD

　　11-15. ADCCA

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