-- _______ teaspoons of salt do we need? --Two.
A. How B. How much C. How many D. How many of
I think there will be _____ people and ______pollution.
A. less, fewer B. less, more C. fewer, less D. fewer, fewer
It may take _________ years to make such robots .
A. hundred of B. two hundreds C. hundreds of D. hundred
When he grows up，he’s going to do .
A. what he wants to do B. what does he want to do
C. what he want to do D. what will he want to do
