用must或have to填空
1.I_____finish my homework today,because my teacher adlked me to do it.
2.I_____finish my homework today,because I want to finish it as early as I can.
3.I_____bring an umbrella today,because it's going to rain this afternoon.
4.I feel thirsty now,so I_____go and buy a bottle of water.
5.I_____see the doctor,because I am ill.