You ()use this room as much as you need
A. will
B. may
C. would
D. must
高血压合并心肌梗死宜选用
A. 苄胺唑啉
B. 哌唑嗪
C. 肼苯哒嗪
D. 美托洛尔
E. 卡托普利
I ()reach Susan by phone. Do you know where she is
A. may not
B. am not able to
C. had to
D. used to
I'm exhausted; I ()too much work to do these days
A. had
B. having
C. have
D. am having