A、 can
B、 must
C、 may
D、 need
答案:C
A、 can
B、 must
C、 may
D、 need
答案:C
A. y=-x+3
B. y=-2x
C. y=-2x+1
D. y=5x+3
A. that you did and saw there
B. when you come back
C. how did you get there
D. if you saw models of spacecraft there
A. putting off
B. putting on
C. putting down
D. putting away
A. can
B. must
C. should
D. is supposed to
A. go
B. to go
C. goes
D. went
A. on
B. at
C. in
D. of
A. π
B. 2π
C. π/2
D. π/4
A. repeat
B. forget
C. receive
D. join
A. it
B. them
C. him
D. her
A. relationship
B. agreement
C. environment
D. investment