Do let your mother know all the truth. She appears everything.
Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don’t use a nest.
You will be successful in the interview __________ you have confidence.
—Where’s that report?—I brought it to you __________ you were in Mr. Black’s office yesterday.
The field research will take Joan and Paul about five months; it will be a long time __________ we meet them again.
It has been announced that candidates(应考者) ________ remain in their seats until all the papers have been collected.