i’m too tired,so i ___ sit down and rest every five muntes .

i'm too tired,so i ___ sit down and rest every five muntes .A.must B,must to C have Dhave to
there is ___ ice in the north of china in winer .A.too B,many C,much too D too much

D 强调客观原因（太累）使自己得坐下休息休息
D 修饰不可数名词ice,这里只有D 可选