Question

_____ Mom had asked Jack to close the window  before he went out,______ he forgot to do it.

A．Though; /	B．Though; but
C．Till; /	D．Until; then

Answer 1

A

考查though的用法。句意“尽管妈妈让杰克出去前记得关窗户，但是他还是忘记了。”though不能与but连用。故选A。