—How long _______ in Shanghai?
—I will be there attending a conference and giving a speech, which will take about 3 days.
| A．have you stayed | B．are you staying | C．do you stay | D．did you stay |
.This washing machine is environmentally friendly because it uses _____water and electricity than _____models.
| A．less; older | B．less; elder | C．fewer; older | D．fewer; elder |
---Mom, what did your doctor say?
---He advised me to live _____the air is fresher.
| A．in where | B．in which | C．the place where | D．where |
If you traveling ___ __the customs are really foreign to your own, please do as the Romans do.
| A．in which | B．what | C．when | D．where |
Although the wind has _____, the rain remains steady, so you will need a raincoat.
| A．turned up | B．gone back | C．died down | D．blown out |
It was already past midnight and only three young men ____in the teahouse.
| A．left | B．remained | C．delayed | D．deserted |