1 . The chemical________ of rainfall changes slightly as rain clouds move.

A．compose

B．confirm

C．concern

D．composition

2 . Which of the underlined parts is not a noun phrase?

A．The first week is a little confusing.

B．The Maths task is not a piece of cake.

C．The Chinese teacher in green joined the party.

D．I think she is the most beautiful girl in my class.

3 . Basketball is a team game, where _________ between the team members is the key to victory.

A．tournament

B．expectation

C．cooperation

D．entertainment

4 . ________ confidence in yourself is the biggest difficulty ________ greater progress in your work.

A．Lacking of; in making	B．Lack of; to make
C．Lack of; in making	D．The lack of; to make

5 . ________is very important in our everyday life.

A．Greet

B．Greeting

C．Greetings

D．Greets