There are eight tips in Dr.Roger's lecture on sleep,and one of them is:________ to bed early unless you think it is necessary.
A.doesn't go | B.not to go |
C.not going | D.don't go |
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There are eight tips in Dr.Roger's lecture on sleep,and one of them is:________ to bed early unless you think it is necessary.
A.doesn't go | B.not to go |
C.not going | D.don't go |