noun + oattack oHis words are an attack on personal liberty.Enemy forces have made an attack on th...

noun + for + nouIt's all right, everybody - there's no need for alarm.I was looking at the schemati...

noun + iAs you step into the air-conditioned office, there is an abrupt change in temperature.There...

构成动词不定式，要做/去做She agreed to help.I need to eat something first."Are you going tonight?" "I'm certainl...

构成动词不定式，要做/去做She agreed to help.I need to eat something first."Are you going tonight?" "I'm certainl...

on + sth，在竖直上方，且有接触Ow, you're standing on my footCan you stand on your headYour suitcase is on top...

on + sth，在竖直上方，且有接触Ow, you're standing on my footCan you stand on your headYour suitcase is on top...

at + 准确/特定地点She's sitting at the table in the corner.She was standing at the top of the stairs.The d...

at + 准确/特定地点She's sitting at the table in the corner.She was standing at the top of the stairs.The d...

Troops shot dead the leader of the rebels in an attack last night.