It’s _________unlucky day today because I lost_______useful book.
--Mum, where did you put my new sports shoes?--Oh, I put them in a box. And ________ box is under your desk.
---I’m going on a trip to Hongkong after the exam.---Really? ___________!
The following are all traffic signs except .
If it rain tomorrow,we’ll go on a trip.
Some volunteers(志愿者) from Beijing arrived in Shanghai April 29 to work for the World Expo.