My little brother is a tidy boy． He always keeps his room ________．（ ）
| A． |
clean |
B． |
to clean |
C． |
cleaning |
D． |
cleaned |
the traffic was heavy， we still got to the railway station on time．（ ）
A．AsB．UnlessC．WhenD．Although
Lily looks down these days．
She has lost a watch which is for her．（ ）
A．enjoyableB．valuable
C．availableD．comfortable
I tried many ways，but of them worked．（ ）
A．allB．bothC．neitherD．none
Children be told not to swim alone in the river．（ ）
A．canB．mayC．mustD．might
It's good for us to a good habit of reading．（ ）
A．developB．chooseC．acceptD．pick