保持_________________将有助于我们身心协调发展，顺利度过青春期。[ ]
A、身体健康
B、个人追求
C、内心梦想
D、心理健康
答案：D
8.3里面有______个1和______个0.1；0.049里面有______个0.001．
— What a mess!
— Hurry up! Something ______. The guests are coming. [ ]
A. must do
B. must be done
C. must be do
