A、 easy
B、 easier
C、 the easiest
D、 very easy
答案:B
A、 easy
B、 easier
C、 the easiest
D、 very easy
答案:B
A. encourage
B. are encouraging
C. are encouraged
D. were encouraged
A. I go,too
B. so will I
C. neither will I
D. so do I
A. need
B. must
C. may
D. has to
A. can
B. may
C. need
D. must
A. big
B. old
C. small
D. cheap
A. in
B. to
C. with
D. at
A. Where
B. When
C. Why
D. How
A. π
B. 2π
C. π/2
D. π/4
A. 0
B. 1
C. -1
D. 不存在
A. π
B. 2π
C. 3π
D. 4π