Mum, can I go out to play with my friends tonight—OK, but you _______ come back before 9 o’clock.

_________reached the classroom when the teacher came.

It was after he had worked on the project for months _____ he found how to solve the problem efficiently. [ ]

How do you think I should receive the reporter? —____ you feel about him, try to be polite.

Theteachercameupwithanideatostoptheboyfromplayingcomputergamesallday