The plan ________ they came up with was very good.

[　　]

Everyone, including my parents, ________ going to be at the party.

[　　]

When she was walking in the street, she met a friend of ________.

[　　]

I would go if I ________.

[　　]

Not only ________ polluted but ________ crowded.

[　　]

A．was the city; were the streets

B．the city Was; were the streets

C．was the city; the streets were

D．the city was; the streets were

The Americans had to put off ________ the space shuttle.

[　　]

How dirty your room is! You must ________.

[　　]

Tom wants to be a volunteer. He'd like to help kids ________ their schoolwork.

________the night of the Christmas Day parents fill their children's stockings with small presents.

[　　]

He's been learning English ________ five years.

[　　]