A:①②
B:②④
C:③④
D:①③
日常我们听到的声音是靠____传来的,声速跟介质的种类有关,还跟____有关.
1947年夏,刘邓大军挺进大别山的消息传到陕北,***欣喜地说:“我们总算熬出头了。”这是因为( )
参考词汇:Saturday, Sunday, morning, afternoon, evening…
do homework, watch TV, go hiking, play sports, go camping, ride a bike, take pictures, clean the room, wash the clothes …
Monday, June 6th
I was busy last weekend. On Saturday, I