问题

The first World Cities Day of the UN, _______on Oct.31, 2014 in Shanghai, focused on leading urban transformation.

A:to have been held
B:having held
C:held
D:being held

正确答案是：

同类题型

In our childhood, we were often________by grandma to pay attention to our table manners.[ ]

Some insects________the colour oftheir surroundings to protect themselves

下列词语中划线字注音、字形全都正确的一项是（）

.Lingling got up early_______she could catch the early bus.

The boy has to buy the bicycle.