求助五道外语题望得到解释11 I _______at the thought of having to make a s

求助五道外语题望得到解释
11 I _______at the thought of having to make a speech in the presence of all my teachers.
a shook b fainted c trembled d declined
key c
12 No bread eaten by man is so sweet as __________earned by his own labor.
a which b what c that d the one
key c
13 It is said that the scientific reach that Marie and the Joliet-curies ________their lives to finally _____their deaths.
a devoting …cause b devoted …causing
c had devoted …caused d were devoted…causing
key c
14 He kept explaining his ideas ,but not a word ____________.
a could we understand b to be understood
c we could understand d to understand
key a
15 The problem was heard ________again at the meeting .
a mentioned b to mention c be discussed d discussing
key a