--- _______ will the fog and haze(雾霾) last? ---I have no idea. There is no sign of an end.
| A．How long | B．How soon |
| C．How far | D．How often |
--- _______ will the fog and haze(雾霾) last? ---I have no idea. There is no sign of an end.
| A．How long | B．How soon |
| C．How far | D．How often |
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