In some developed countries, larger population is ______________ in their big cities.
#105154
A
approved
B
gathered
C
concentrated
D
fixed
推荐题目
 The teacher suggested that the dictionary ______ at once .
#105058
A
be referred to be bought
B
be referred to being bought
C
referred to being bought
D
referred to be bought
He ______ his sister to give up the plan for cycling along the Mekong River, but failed. 
#105220
A
persuaded
B
tried to persuade
C
advised
D
Both B and C