Many a boy and many a student ______ looking forward to visiting the United States of America at present.
A. are
B. were
C. is
D. was
可用于气滞型胃脘痛的非处方中成药是
A. 五味清浊丸
B. 良附丸
C. 小建中颗粒
D. 胃苏颗粒
E. 以上均不是
This kind of cakes ______ good while cakes of that kind ______ different.
A. taste; are
B. tastes; are
C. smells; is
D. look; are
Every means ______ tried, but in vain.
A. have been
B. has been
C. are
D. is