Electric trains have now_____ steam trains in England .

[　　]

A．taken the place of　　　　   B．taken their place

While I was wondering at this, our schoolmaster ________.

[　　]

A．took his place　　   B．took the place of

I imagine you are not very ________ politics.

[　　]

People ________ are not welcome here.

[　　]

A．smoking　　　　　　　　   B．smoked

Is this a ________ taxi?

[　　]

A．waiting　　　　　　　    　B．waited

The line is ________ to traffic on National Day .

[　　]

A．to open　　　　　　　   　B．to be opened

We often see musicians ________ in the streets.

[　　]

A．to perform　　　　　　　　    B．performing

Not only ________ no school, but also no hospital.

[　　]

A．there was　　　　　　　　  B．was there.

That's a bit windy today, ________?

[　　]

A．isn't it　　　    　B．isn't that

I have been looking forward ________ my grandmother.

[　　]

A．to see　　　　　　　　　   　B．to seeing