It was not until she got home ___ Jennifer realized she had lost her keys.

Shall I help you with the washing up—．I’ll do it later．

Why has he been staying at home these days? –He ___________ since a month ago

This book contains a ________ of several articles in nuclear physics so you can read it before you read the book in detail.

Gou-de-le, which is one of the largest supermarket Meitans, _____ some of its stores open 24 hours on Mondays through Saturdays.