【简答题】In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them, but it can be an exciting one as well. To make it easie...
【简答题】In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them,but it can be an exciting one as well. To make it easier...
【单选题】-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.
A.
volunteers; volunteers
【多选题】常见矿物集合体的类型包括____集合体、____集合体、____集合体。