I have two sisters but ______ of them likes music as I do.
A. either
B. none
C. neither
D. both
胎儿胸腺移植
A. 可治疗严重联合免疫缺陷病
B. 可治疗细胞免疫缺陷
C. 可治疗腺苷脱氨酸(ADA)缺陷所致的严重联合免疫缺陷病
D. 可治疗选择性IgG类缺陷，Ig水平近于正常的抗体缺陷
E. 可治疗选择性IgA缺陷
You won' t be able to find the job ______ you start right now.
A. lest
B. so that
C. unless
D. that
Tom was brave enough to ______ his opinion in public.
A. speak of
B. speak to
C. speak out
D. speak for
微信支付 
支付宝支付