My sister _______ to Beijing next Tuesday.
A. goes
B. will go
C. has gone
D. went
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My mother says she ______ me a beautiful present on my next birthday.
A. will give
B. is giving
C. gives
D. given
You should be more confident _____ you attend the competition.
A. before
B. after
C. when
D. that
Don't leave the classroom ______ you finish your exercises.
A. before
B. after
C. when
D. which
Please buy a dozen of eggs ______ you go to the supermarket.
A. after
B. when
C. before
D. which