after several long moments,a small hand slowly went up,（ ）back down,and then went up again.after several long moments,a small hand slowly went up,（ ）back down,and then went up again.请问这里为什么是drop down不可以是hold down,hold

I'm really t_ after a long walk I'm sure he will be back __.just wait a minute.A.long before B.before long C.after long D.long after 托福TPO求助句子分析,The desert sections of long river respnd several months after rain has fallen outside the desert. after a long long-sought-after see you after several months 的意思 请问several inches long.是什么结构,long是什么词性? after several long moments,a small hand slowly went up,（ ）back down,and then went up again.after several long moments,a small hand slowly went up,（ ）back down,and then went up again.请问这里为什么是drop down不可以是hold down,hold 英语作文 some schools or universities have cancelled long distance races due to several students sudden deaths across China after long distance race.发表你的看法,60词, A:Long time no see What( )you( )after you leave school B:I'm a policemen I'm k______of tired after a long walk.I want to have a rest. long after和after long 的区别是啥 l'm tired after a long walk .i'd like to l to music for a m( ) . 对 several hours 提问用how soon 还是how long? several several several several