英国科学史专家丹皮尔在《科学史》中指出:“那时哲学与科学仍是混淆不清。连笛卡尔在为天文学建立一种力学理论时,也把它放在经院哲学的相反的观点和认为物质的本质是广延性的形而上学见解的基础上。牛顿摆脱了这些先人之见,实在是一种真正的进步。”牛顿的进步性主要在于
Must I prepare for the trip today?
No,you ____ prepare for it today,You can do it tomorrow.( )
need
don't need
needn't
How time flies!It's two _____since we met last.
So it is.I miss you so much.( )
months
monthes
months'
is it from your home to school?
It's about two kilometers.( )
How long
How far
How soon
How often
Some boys in our class _____the football club for a year.They are crazy about playing football now.( )
joined
have joined
have been in
I wonder if our foreign teacher Mr.White ____to his hometown next Tuesday.
I'm not sure.But if he returns to his hometown,I____him off.( )
return; see
will return;see
will return; will see