1、题目16:cosπ=( )

A. 　how happy was he

B. 　how happy he was

C. 　how was he happy

D. 　how he happy was

A. 　is directed

B. 　was directed

C. 　directed

D. 　directs

A. 　need

B. 　must

C. 　may

D. 　has to

A. 　If

B. 　Since

C. 　Although

D. 　Because

A. 　π

B. 　2π

C. 　4π

D. 　π/2

A. 0

B. 1

C. 2

D. 3

A. 　many

B. 　enough

C. 　few

D. 　little

A. 　in

B. 　to

C. 　with

D. 　at

A. 　4x-5

B. 　2x-8

C. 　2x-3

D. 　2x-4

A. 　turn up

B. 　give up

C. 　stay up

D. 　grow up