We can’t do well in exams we study hard.
A. if B. and C. since D. unless
As a student, it is your to study hard.
A. duty B. mistakes C. notes D. challenge
When I have problems I often ask my father .
A. to helping B. help C. for help D. to help
Can you tell me the best way the problem?
A. solve B. solved
C. to solve D. solving
We must learn how these “problems” “challenges”.
A. change in B.change，into
C. to change , into D. to changed, into
— do you study for a test?
—I study_______ working with a group .
A. What , with B. How, by
C. Why , by D. What, by
