The scientists told us _______ about three days from Earth to the moon by spaceship.
A. whether it takes B. that it takes
C. if did it take D. that did it take
My sister likes eating _______, but I don’t like eating them.
A. meat B. vegetables
C. hamburger D. some bread
-- _______ is the man in the white shirt? -- He is an engineer.
A. How B. Where
C. Who D. What
In our library, the number of books ________ more than 40,000.
A. is B. are
C. has D. have
The entrance exam is only fifteen days away from now. You will fail the exam ______ you study hard from now on.
A. if B. as soon as
C. unless D. although
Jack found ______ hard to get along with the other boys in his class.
A. it B. that
C. this D. those
