What _______ public is concerned about is whether medical workers and scientists will be able to find _______ cure for this new disease after the vaccine is tried on _______ volunteers.
第二部分:英语知识运用(共二节,满分30分)
第一节语法和词汇知识(共15小题;每小题1分,满分15分)
21. ----Are you familiar ____________ the customs here?
----No, the place is unfamiliar ___________ me.