He hurried home,never once looking back to see if he_________.
A:was being followed
B:was following
C:had been followed
D:followed
⑴Lily is on the phone. ____ A.
⑵Jim can carry this bag.____ B.
⑶Be careful!The water is very hot.____ C.
⑷The apples are falling! ____ D.
⑸The plane is flying away.____ E.
读地形图
如图是a、b两种固体物质的溶解度曲线.从图中可获得的信息是( )